Flexible multi-layered cover lens stacks for foldable displays

ABSTRACT

Embodiments described and discussed herein generally relate to flexible or foldable display devices, and more specifically to flexible cover lens assemblies. In one or more embodiments, a flexible cover lens assembly contains a substrate, an anti-fingerprint coating layer, and an adhesion promotion layer disposed between the substrate and the anti-fingerprint coating layer.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims benefit to U.S. Appl. No. 62/867,144, filed onJun. 26, 2019, which is herein incorporated by reference.

BACKGROUND Field

Implementations described herein generally relate to flexible orfoldable display devices, and more specifically to flexible or foldablecover lens.

Description of the Related Art

Electronic devices often have displays such as liquid crystal displays(LCDs), organic light emitting-diode (OLED) displays, and quantum dot(QD) displays. Such displays can be fragile and sensitive to moisture,pressure, or particle contamination. Generally, display devices useseveral layers of optical devices to colorize, polarize, and shutterlight from an illumination source. To prevent damage to the underlyingfilm, a rigid display cover lens layer is mounted over the other layersto prevent damage to the underlying layers. The inclusion of the rigiddisplay cover lens can add undesirable weight to an electronic device.The cover lens can be omitted to reduce the size and weight of a device,but omitting the cover lens can make the display susceptible to damagefrom scratches.

An increasing demand for new functionalities of products and exploitingnew and broad applications calls for thinner and lighter lens substrateswith new properties such as flexibility. Broadly, three maincharacteristics are desired from a cover lens for these new flexible orfoldable displays: 1) optical performance, 2) high hardness, and 3)flexibility. Good optical performance ensures good transmission of lightwith very little haze. High hardness relates to scratch and abrasionresistance. Foldability (e.g., relative high degree of flexibility) incover lenses is in terms of having a high enough critical strain thatfailure due to crack or delamination is avoided when repeatedly bent andfolded.

Traditionally, while cover lenses have been excellent at addressing thefirst two characteristics (e.g., optical performance and hardness),cover lenses have been poor at the third characteristic, e.g.,flexibility or foldability, due to the brittle nature of the coverlenses. To improve flexibility, significant prior effort has gone intoincreasing the critical-strain at failure for glass, mainly by reducingthe thickness of glass or chemical modification of the materials.Nonetheless, glass as a material for cover lens has been found such thatwhen the glass fails the entire cover has to be replaced. Alternatesolutions for cover lenses may bring excellent optical performance andflexibility but are typically vulnerable to abrasion and or scratches.Once damaged by scratches, the entire cover has to be replaced,Replacing the cover lens requires specific expertise, time, and is doneat a great expense.

Therefore, there is a need for improved display cover lens for flexibleor foldable displays.

SUMMARY

Embodiments described and discussed herein generally relate to flexibleor foldable display devices, and more specially to flexible cover lensassemblies. In one or more embodiments, a flexible cover lens assemblycontains a glass layer, an adhesion promotion layer on the glass layer,an anti-reflectance layer disposed on the adhesion promotion layer, adry hardcoat layer having a nano-indentation hardness in a range fromabout 1 GPa to about 5 GPa and disposed on the anti-reflectance layer,and an anti-fingerprint coating layer disposed on the dry hardcoatlayer.

In some embodiments, a flexible cover lens assembly contains a glasslayer, a substrate disposed on the glass layer, an adhesion promotionlayer on the substrate, an anti-reflectance layer disposed on theadhesion promotion layer, a dry hardcoat layer having a porosity ofabout 1% to about 7% and disposed on the anti-reflectance layer, and ananti-fingerprint coating layer disposed on the dry hardcoat layer.

In other embodiments, a flexible cover lens assembly contains a glasslayer, a substrate disposed on the glass layer, a wet hardcoat layerhaving a nano-indentation hardness in a range from about 0.4 GPa toabout 1.5 GPa and disposed on the substrate, an anti-reflectance layerdisposed on the wet hardcoat layer, an adhesion promotion layer disposedon the anti-reflectance layer, and an anti-fingerprint coating layerdisposed on the adhesion promotion layer.

In one or more embodiments, a flexible cover lens assembly contains aglass layer, an adhesion promotion layer disposed on the glass layer, adry hardcoat layer having a nano-indentation hardness in a range fromabout 1 GPa to about 5 GPa and disposed on the adhesion promotion layerand an anti-fingerprint coating layer disposed on the dry hardcoatlayer.

In some embodiments, a flexible cover lens assembly contains a glasslayer, a substrate disposed on the glass layer, an adhesion promotionlayer disposed on the substrate, a dry hardcoat layer having a porosityof about 1% to about 7% and disposed on the adhesion promotion layer,and an anti-fingerprint coating layer disposed on the dry hardcoatlayer.

In other embodiments, a flexible cover lens assembly contains a glasslayer, a substrate disposed on the glass layer, a wet hardcoat layerhaving a nano-indentation hardness in a range from about 0.4 GPa toabout 1.5 GPa and disposed on the substrate, an adhesion promotion layerdisposed on the wet hardcoat layer, a dry hardcoat layer disposed on theadhesion promotion layer and having a nano-indentation hardness in arange from about 1 GPa to about 5 GPa and a porosity of about 1% toabout 7%, and an anti-fingerprint coating layer disposed on the dryhardcoat layer.

In one or more embodiments, a flexible cover lens assembly contains asubstrate, an anti-fingerprint coating layer, and an adhesion promotionlayer disposed between the substrate and the anti-fingerprint coatinglayer.

In some embodiments, a flexible cover lens assembly contains asubstrate, an adhesion promotion layer disposed on the substrate, a dryhardcoat layer disposed on the adhesion promotion layer and having aporosity of about 1% to about 7% and a nano-indentation hardness in arange from about 1 GPa to about 5 GPa, and an anti-fingerprint coatinglayer disposed on the dry hardcoat layer.

In other embodiments, a flexible cover lens assembly contains asubstrate, a wet hardcoat layer having a nano-indentation hardness in arange from about 0.4 GPa to about 1.5 GPa and disposed on the substrate,an adhesion promotion layer disposed on the wet hardcoat layer, a dryhardcoat layer having a nano-indentation hardness in a range from about1 GPa to about 5 GPa and disposed on the adhesion promotion layer, andan anti-fingerprint coating layer disposed on the dry hardcoat layer.

In one or more embodiments, a flexible cover lens assembly contains aglass layer, an impact absorption layer disposed on the glass layer, amoisture barrier layer disposed on the impact absorption layer, asubstrate disposed on the moisture barrier layer, a wet hardcoat layerhaving a nano-indentation hardness in a range from about 0.4 GPa toabout 1.5 GPa and disposed on the substrate, an adhesion promotion layerdisposed on the wet hardcoat layer, an anti-reflectance layer disposedon the adhesion promotion layer, a dry hardcoat layer having anano-indentation hardness in a range from about 1 GPa to about 5 GPa anddisposed on the anti-reflectance layer, and an anti-fingerprint coatinglayer disposed on the dry hardcoat layer.

In some embodiments, a flexible cover lens assembly contains a glasslayer, a first adhesion promotion layer disposed on the glass layer, awet hardcoat layer having a nano-indentation hardness in a range fromabout 0.4 GPa to about 1.5 GPa and disposed on the first adhesionpromotion layer, a second adhesion promotion layer disposed on the wethardcoat layer, a dry hardcoat layer having a nano-indentation hardnessin a range from about 1 GPa to about 5 GPa and disposed on the secondadhesion promotion layer, and an anti-fingerprint coating layer disposedon the dry hardcoat layer.

In other embodiments, a flexible cover lens assembly contains a glasslayer, a first adhesion promotion layer disposed on the glass layer, awet hardcoat layer having a porosity of about 6% to about 10% anddisposed on the first adhesion promotion layer, a second adhesionpromotion layer disposed on the wet hardcoat layer, a dry hardcoat layerhaving a porosity of about 1% to about 7% and disposed on the secondadhesion promotion layer, and an anti-fingerprint coating layer disposedon the dry hardcoat layer, where the flexible cover lens assembly has acritical strain of greater than 1% to about 15%.

In some embodiments, a flexible cover lens assembly contains asubstrate, an anti-fingerprint coating layer, and an adhesion promotionlayer disposed between the substrate and the anti-fingerprint coatinglayer. In some examples, the flexible cover lens assembly also containsa dry hardcoat layer disposed between the adhesion promotion layer andthe anti-fingerprint coating layer. In other embodiments, a flexiblecover lens assembly contains an anti-fingerprint coating layer, anadhesion promotion layer, and a dry hardcoat layer disposed between theadhesion promotion layer and the anti-fingerprint coating layer.

In one or more embodiments, a flexible cover lens assembly contains asubstrate, a wet hardcoat layer disposed on the substrate, an adhesionpromotion layer disposed on the wet hardcoat layer, a dry hardcoat layerdisposed on the adhesion promotion layer, and an anti-fingerprintcoating layer disposed on the dry hardcoat layer.

In other embodiments, a flexible cover lens assembly contains a glasslayer, an adhesion promotion layer disposed on the glass layer, a secondor dry hardcoat disposed on the adhesion promotion layer, and ananti-fingerprint coating layer disposed on the dry hardcoat layer. Inone or more examples, the flexible cover lens assembly also includes asubstrate disposed between the glass layer and the adhesion promotionlayer. In other examples, the flexible cover lens assembly includes awet hardcoat layer disposed between the substrate and the adhesionpromotion layer.

In some embodiments, a flexible cover lens assembly contains an adhesionpromotion layer, an anti-reflectance layer disposed on the adhesionpromotion layer, a dry hardcoat layer disposed on the anti-reflectancelayer, and an anti-fingerprint coating layer disposed on the dryhardcoat layer. In some examples, the flexible cover lens assemblyfurther contains a glass layer disposed on the adhesion promotion layer,wherein the adhesion promotion layer is disposed between the glass layerand the anti-reflectance layer. In other examples, the flexible coverlens assembly also contains a substrate disposed between the glass layerand the adhesion promotion layer.

In one or more embodiments, a flexible cover lens assembly contains aglass layer, a substrate disposed on the glass layer, a wet hardcoatlayer disposed on the substrate, an anti-reflectance layer disposed onthe wet hardcoat layer, an adhesion promotion layer disposed on theanti-reflectance layer, and an anti-fingerprint coating layer disposedon the adhesion promotion layer.

In other embodiments, a flexible cover lens assembly contains asubstrate, a wet hardcoat layer disposed on the substrate, an adhesionpromotion layer disposed on the wet hardcoat layer, an anti-reflectancelayer disposed on the adhesion promotion layer, a dry hardcoat layerdisposed on the anti-reflectance layer, and an anti-fingerprint coatinglayer disposed on the dry hardcoat layer.

In some embodiments, a flexible cover lens assembly contains a glasslayer, a substrate disposed on the glass layer, a wet hardcoat layerdisposed on the substrate, an adhesion promotion layer disposed on thewet hardcoat layer, an anti-reflectance layer disposed on the adhesionpromotion layer, a dry hardcoat layer disposed on the anti-reflectancelayer, and an anti-fingerprint coating layer disposed on the dryhardcoat layer.

In one or more embodiments, a flexible cover lens assembly contains aglass layer, an impact absorption layer disposed on the glass layer, asubstrate disposed on the impact absorption layer, an adhesion promotionlayer disposed on the substrate, an anti-reflectance layer disposed onthe adhesion promotion layer, a dry hardcoat layer disposed on theanti-reflectance layer, and an anti-fingerprint coating layer disposedon the dry hardcoat layer. In some examples, the flexible cover lensassembly further includes a wet hardcoat layer disposed between thesubstrate and the adhesion promotion layer.

In other embodiments, a flexible cover lens assembly contains an impactabsorption layer, a substrate disposed on the impact absorption layer, awet hardcoat layer disposed on the substrate, an adhesion promotionlayer disposed on the wet hardcoat layer, an anti-reflectance layerdisposed on the adhesion promotion layer, a dry hardcoat layer disposedon the anti-reflectance layer, and an anti-fingerprint coating layerdisposed on the dry hardcoat layer. In one or more examples, theflexible cover lens assembly further includes a glass layer disposedbetween the impact absorption layer and the substrate.

In some embodiments, a flexible cover lens assembly contains a moisturebarrier layer, a substrate disposed on the moisture barrier layer, a wethardcoat layer disposed on the substrate, an adhesion promotion layerdisposed on the wet hardcoat layer, an anti-reflectance layer disposedon the adhesion promotion layer, a dry hardcoat layer disposed on theanti-reflectance layer, and an anti-fingerprint coating layer disposedon the dry hardcoat layer. In some examples, the flexible cover lensassembly contains an impact absorption layer disposed between themoisture barrier layer and the substrate.

In one or more embodiments, a flexible cover lens assembly contains amoisture barrier layer, an impact absorption layer disposed on themoisture barrier layer, a substrate disposed on the impact absorptionlayer, an adhesion promotion layer disposed on the substrate, ananti-reflectance layer disposed on the adhesion promotion layer, a dryhardcoat layer disposed on the anti-reflectance layer, and ananti-fingerprint coating layer disposed on the dry hardcoat layer.

In one or more embodiments, a flexible and replaceable cover lens stackcontains a first flexible cover lens, a second flexible cover lens, anda sacrificial adhesion layer disposed between the first flexible coverlens and the second flexible cover lens. Each of the first flexiblecover lens and the second flexible cover lens is or includes any one ofthe flexible cover lens assemblies described and discussed herein, wherethe first and second cover lens are different.

In other embodiments, a display device includes any one of the flexiblecover lens assemblies described and discussed herein and a flexibledisplay structure, such as, for example an OLED display or an LCDdisplay.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the manner in which the above recited features of the disclosurecan be understood in detail, a more particular description of thedisclosure, briefly summarized above, may be had by reference toimplementations, some of which are illustrated in the appended drawings.It is to be noted, however, that the appended drawings illustrate onlytypical implementations of this disclosure and are therefore not to beconsidered limiting of scope, for the disclosure may admit to otherequally effective implementations.

FIG. 1 depicts a schematic, cross-sectional view of a display devicecontaining a flexible cover lens assembly, according to one or moreembodiments described and discussed herein.

FIG. 2 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 3 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 4 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 5 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 6 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 7 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 8 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 9 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 10 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 11 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 12 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 13 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 14 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 15 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 16 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 17 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 18 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 19 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 20 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 21 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 22 depicts a schematic, cross-sectional view of a display devicecontaining another flexible cover lens assembly, according to one ormore embodiments described and discussed herein.

FIG. 23 depicts a schematic, cross-sectional view of a flexible andreplaceable cover lens stack, according to one or more embodimentsdescribed and discussed herein.

FIG. 24 depicts a schematic, cross-sectional view of an adhesionpromotion layer containing a plurality of sublayers, according to one ormore embodiments described and discussed herein.

FIG. 25 depicts a schematic, cross-sectional view of a display structureaccording to one or more embodiments described and discussed herein.

To facilitate understanding, identical reference numerals have beenused, where possible, to designate identical elements that are common tothe Figures. It is contemplated that elements and features of oneimplementation may be beneficially incorporated in other implementationswithout further recitation.

DETAILED DESCRIPTION

Implementations described herein generally relate to flexible displaydevices, and more specifically to cover lens assemblies containingflexible cover lens with multi-layer film stacks.

FIG. 1 depicts a schematic, cross-sectional view of a display device 100containing a flexible cover lens assembly 102 disposed on a flexibledisplay structure or flexible display stack (FDS) 104, according to oneor more embodiments described and discussed herein. The flexible coverlens assembly 102 contains a glass layer 110, an impact absorption layer(IAL) 120 disposed on the glass layer 110, a moisture barrier layer 130disposed on the impact absorption layer 120, a substrate 140 disposed onthe moisture barrier layer 130, a first or wet hardcoat (HC) layer 150disposed on the substrate 140, an adhesion promotion layer (APL) 160disposed on the wet hardcoat layer 150, an anti-reflectance (ARF) layer170 disposed on the adhesion promotion layer 160, a second or dryhardcoat (HC) layer 180 disposed on the anti-reflectance layer 170, andan anti-fingerprint coating (AFC) layer 190 disposed on the dry hardcoatlayer 180. In one or more examples, the wet hardcoat layer 150 can havea pencil hardness in a range from about 2H to about 9H, anano-indentation hardness in a range from about 0.4 GPa to about 1.5GPa, and a porosity of about 6% to about 10%, and the dry hardcoat layer180 can have a pencil hardness in a range from about 2H to about 9H, anano-indentation hardness in a range from about 1 GPa to about 5 GPa,and a porosity of about 1% to about 7%.

Flexible Display Structure (FDS) and Glass Layer

The FDS 104 is a flexible display structure or flexible display stackwhich can be or include one or more light emitting diode (LED) displays,one or more organic light emitting diode (OLED) displays, one or moreliquid crystal displays (LCDs), one or more quantum dot (QD) displays,as well as other type of displays. The FDS 104 can be or include one ormore flexible displays and/or one or more rigid displays. The FDS 104can be or include other types of devices and can be contained within ora part of a monitor, a display, a screen, a television, a phone (e.g.,mobile phone, smart phone, or cellular phone), a computer or laptop, atablet, a watch, or other electronic device. In some examples, the FDS104 can be or include a foldable screen or foldable display on afoldable or flip phone. In other examples, the FDS 104 can be or includea foldable screen or foldable display on a foldable laptop computer orfoldable tablet.

In one or more embodiments, the FDS 104 may or may not have a displayglass layer as an upper surface. In some examples, the FDS 104 does nothave a display glass layer as the upper surface but instead includes theglass layer 110. In other examples, the FDS 104 does have a displayglass layer (not shown) as the upper surface and the glass layer 110 isomitted in the flexible cover lens assembly 102 or other flexible coverlens assemblies described and discussed herein. In some examples, theFDS 104 does have a display glass layer (not shown) as the upper surfaceand the glass layer 110 is disposed on the display glass layer of theFDS 104 in the flexible cover lens assembly 102 or other flexible coverlens assemblies described and discussed herein.

The glass layer 110 is or includes one or more layers containing glasswhich are optically clear or transparent. In some examples, the glasslayer 110 contains one or more ultra-thin glass layers. The glass layer110 has a thickness of about 5 μm, about 10 μm, about 15 μm, about 20μm, or about 30 μm to about 40 μm, about 50 μm, about 60 μm, about 70μm, about 80 μm, about 90 μm, about 100 μm, about 120 μm, about 150 μm,about 200 μm, or greater. For example, the glass layer 110 has athickness of about 5 μm to about 200 μm, about 10 μm to about 200 μm,about 20 μm to about 200 μm, about 50 μm to about 200 μm, about 80 μm toabout 200 μm, about 100 μm to about 200 μm, about 150 μm to about 200μm, about 5 μm to about 100 μm, about 10 μm to about 100 μm, about 20 μmto about 100 μm, about 50 μm to about 100 μm, about 80 μm to about 100μm, about 100 μm to about 120 μm, about 5 μm to about 80 μm, about 10 μmto about 80 μm, about 20 μm to about 80 μm, or about 50 μm to about 80μm.

Impact Adsorption Layer (IAL)

The impact absorption layer 120 can be or include one or more layerswhich are bendable, flexible, and/or foldable and used to absorb shockor impact. The impact absorption layer 120 contains one or morematerials which can be or include ether urethane, ester urethane,aliphatic urethane, aliphatic polyurethane, aliphatic polyesterurethane, polysulfide thermoset, poly amide, copolymers thereof,elastomers thereof, or any combination thereof. In some examples, theimpact absorption layer 120 can be deposited or otherwise formed bysolution processing and include using techniques such as bar-coater,slot-die, or other methods. In one or more embodiments, the impactabsorption layer 120 can be formed, treated, and/or otherwise processedon a sheet-to-sheet processing system or a roll-to-roll processingsystem. For example, the impact absorption layer 120 can deposited,coated, or otherwise formed on an underlying surface, layer, or deviceby one or more sheet-to-sheet or roll-to-roll process techniques.

The impact absorption layer 120 has an optical transmission in thevisible range within a range from about 82%, about 85%, about 86%, about88%, or about 90% to about 92%, about 94%, about 95%, about 96%, about97%, about 98%, or about 99%. For example, the impact absorption layer120 has an optical transmission in the visible range within a range fromabout 82% to about 99%, about 85% to about 99%, about 88% to about 99%,about 90% to about 99%, about 92% to about 99%, about 95% to about 99%,about 97% to about 99%, about 82% to about 98%, about 85% to about 98%,about 88% to about 98%, about 90% to about 98%, about 92% to about 98%,about 95% to about 98%, about 97% to about 98%, about 82% to about 96%,about 85% to about 96%, about 88% to about 96%, about 90% to about 96%,about 92% to about 96%, or about 95% to about 96%.

The impact absorption layer 120 has a thickness of about 0.5 μm, about 1μm, about 2 μm, about 5 μm, about 10 μm, about 15 μm, about 20 μm, orabout 25 μm to about 30 μm, about 40 μm, about 50 μm, about 60 μm, about70 μm, about 80 μm, about 90 μm, about 100 μm, about 120 μm, about 150μm, about 200 μm, or greater. For example, the impact absorption layer120 has a thickness of about 0.5 μm to about 200 μm, about 1 μm to about200 μm, about 5 μm to about 200 μm, about 10 μm to about 200 μm, about20 μm to about 200 μm, about 35 μm to about 200 μm, about 50 μm to about200 μm, about 80 μm to about 200 μm, about 100 μm to about 200 μm, about150 μm to about 200 μm, about 0.5 μm to about 150 μm, about 1 μm toabout 150 μm, about 5 μm to about 150 μm, about 10 μm to about 150 μm,about 20 μm to about 150 μm, about 35 μm to about 150 μm, about 50 μm toabout 150 μm, about 80 μm to about 150 μm, about 100 μm to about 150 μm,about 125 μm to about 150 μm, about 0.5 μm to about 100 μm, about 1 μmto about 100 μm, about 5 μm to about 100 μm, about 10 μm to about 100μm, about 20 μm to about 100 μm, about 35 μm to about 100 μm, about 50μm to about 100 μm, or about 80 μm to about 100 μm.

In one or more examples, the impact absorption layer 120 can include anelastomer layer with a thickness of less than 100 μm, such as about 75μm or less. In some examples, the impact absorption layer 120 can beslot die coated or cast.

Moisture Barrier Layer (MBL)

The moisture barrier layer 130 can be one or more films, coatings, orother layers which have intrinsic moisture or water barrier propertiesand are bendable, flexible, and/or foldable. In some embodiments, themoisture barrier layer 130 contains one or more one or more layers, suchas a moisture and/or water vapor barrier layer, a high surface energylayer (e.g., hydrophilic properties), a planarization layer, anencapsulation layer, portions of layers thereof, or combinationsthereof. In one or more embodiments, the moisture barrier layer 130contains one or more materials which can be or include silicon oxide,silicon nitride, silicon oxynitride, a dopant thereof, or anycombination thereof.

In some embodiments, the moisture barrier layer 130 contains a singlelayer, but can also include multiples layers, such as 2, 3, 4, 5, 6, 7,8, 9, or more sublayers. For example, the moisture barrier layer 130 caninclude a plurality of sublayers contained therein, such as from about 2sublayers to about 5 sublayers. In one or more examples, the moisturebarrier layer 130 contains a film stack having three or more sublayers,such as a first sublayer, a second sublayer, and a third sublayer—wherethe second sublayer is disposed between the first and second sublayers.In one example, the film stack is a SiN/SiO/SiN stack where the firstsublayer can be or include silicon nitride, the second sublayer can beor include silicon oxide, and the third sublayer contains siliconnitride. The moisture barrier layer 130 is deposited or otherwiseproduced from one or more vapor deposition processes which can be orinclude physical vapor deposition (PVD), chemical vapor deposition(CVD), plasma-enhanced CVD (PE-CVD), high-density plasma CVD (HDP-CVD),atomic layer deposition (ALD), plasma-enhanced ALD (PE-ALD), othervacuum or vapor deposition processes, or any combination thereof. In oneor more embodiments, the moisture barrier layer 130 can be formed,treated, and/or otherwise processed on a sheet-to-sheet processingsystem or a roll-to-roll processing system. For example, the moisturebarrier layer 130 can deposited, coated, or otherwise formed on anunderlying surface, layer, or device by one or more sheet-to-sheet orroll-to-roll process techniques.

The moisture barrier layer 130 has a thickness of about 5 nm, about 10nm, about 20 nm, about 30 nm, about 40 nm, or about 50 nm to about 60nm, about 80 nm, about 100 nm, about 150 nm, about 200 nm, about 250 nm,about 300 nm, about 400 nm, about 500 nm, about 600 nm, about 700 nm, orgreater. For example, the moisture barrier layer 130 has a thickness ofabout 5 nm to about 700 nm, about 5 nm to about 500 nm, about 5 nm toabout 400 nm, about 5 nm to about 350 nm, about 5 nm to about 300 nm,about 5 nm to about 250 nm, about 5 nm to about 200 nm, about 5 nm toabout 150 nm, about 5 nm to about 100 nm, about 5 nm to about 80 nm,about 5 nm to about 50 nm, about 5 nm to about 30 nm, about 20 nm toabout 500 nm, about 20 nm to about 400 nm, about 20 nm to about 350 nm,about 20 nm to about 300 nm, about 20 nm to about 250 nm, about 20 nm toabout 200 nm, about 20 nm to about 150 nm, about 20 nm to about 100 nm,about 20 nm to about 80 nm, about 20 nm to about 50 nm, about 20 nm toabout 30 nm, about 50 nm to about 500 nm, about 50 nm to about 400 nm,about 50 nm to about 350 nm, about 50 nm to about 300 nm, about 50 nm toabout 250 nm, about 50 nm to about 200 nm, about 50 nm to about 150 nm,about 50 nm to about 100 nm, or about 50 nm to about 80 nm.

The moisture barrier layer 130 has a water vapor transport rate (WVTR)of about 1×10⁻⁶ g/m²/day, about 1×10⁻⁵ g/m²/day, about 1×10⁻⁴ g/m²/day,or about 1×10⁻³ g/m²/day to about 1×10⁻² g/m²/day, about 0.1 g/m²/day,about 0.5 g/m²/day, about 1 g/m²/day, about 5 g/m²/day, or about 10g/m²/day. For example, the moisture barrier layer 130 has a WVTR withina range from about 1×10⁻⁶ g/m²/day to about 10 g/m²/day, about 1×10⁻⁵g/m²/day to about 10 g/m²/day, about 1×10⁻⁴ g/m²/day to about 10g/m²/day, about 1×10⁻³ g/m²/day to about 10 g/m²/day, about 1×10⁻²g/m²/day to about 10 g/m²/day, about 0.1 g/m²/day to about 10 g/m²/day,about 0.5 g/m²/day to about 10 g/m²/day, about 1 g/m²/day to about 10g/m²/day, about 1×10⁻⁶ g/m²/day to about 1 g/m²/day, about 1×10⁻⁵g/m²/day to about 1 g/m²/day, about 1×10⁻⁴ g/m²/day to about 1 g/m²/day,about 1×10⁻³ g/m²/day to about 1 g/m²/day, about 1×10⁻² g/m²/day toabout 1 g/m²/day, about 0.1 g/m²/day to about 1 g/m²/day, or about 0.5g/m²/day to about 1 g/m²/day.

The moisture barrier layer 130 has an optical transmission in thevisible range within a range from about 82%, about 85%, about 86%, about88%, or about 90% to about 92%, about 94%, about 95%, about 96%, about97%, about 98%, or about 99%. For example, the moisture barrier layer130 has an optical transmission in the visible range within a range fromabout 82% to about 99%, about 85% to about 99%, about 88% to about 99%,about 90% to about 99%, about 92% to about 99%, about 95% to about 99%,about 97% to about 99%, about 82% to about 98%, about 85% to about 98%,about 88% to about 98%, about 90% to about 98%, about 92% to about 98%,about 95% to about 98%, about 97% to about 98%, about 82% to about 96%,about 85% to about 96%, about 88% to about 96%, about 90% to about 96%,about 92% to about 96%, or about 95% to about 96%.

Substrate

The substrate 140 can be or include one or more flexible plastic orpolymeric substrates. The substrate 140 can be transparent and/orcolorless. The substrate 140 contains one or more materials which can beor include one or more of polyethylene terephthalates (PET),triacetylcelluloses, polycarbonates, polyimides, colorless polyimides(CPI), polyamides, polysulfides, polymethacrylic acid methyl esters,polyether ether ketones, polyaryletherketones, transparent conductivepolyesters, copolymers thereof, elastomers thereof, or any combinationthereof.

The substrate 140 has a thickness of about 1 μm, about 2 μm, about 5 μm,about 10 μm, about 15 μm, about 20 μm, or about 25 μm to about 30 μm,about 40 μm, about 50 μm, about 60 μm, about 70 μm, about 80 μm, about90 μm, about 100 μm, about 120 μm, about 150 μm, about 200 μm, orgreater. For example, the substrate 140 has a thickness of about 5 μm toabout 200 μm, about 10 μm to about 200 μm, about 20 μm to about 200 μm,about 50 μm to about 200 μm, about 80 μm to about 200 μm, about 5 μm toabout 100 μm, about 10 μm to about 100 μm, about 20 μm to about 100 μm,about 30 μm to about 100 μm, about 50 μm to about 100 μm, about 80 μm toabout 100 μm, about 5 μm to about 80 μm, about 10 μm to about 80 μm,about 20 μm to about 80 μm, about 30 μm to about 80 μm, about 50 μm toabout 80 μm, about 60 μm to about 80 μm, about 5 μm to about 50 μm,about 10 μm to about 50 μm, about 20 μm to about 50 μm, or about 30 μmto about 50 μm.

First or Wet Hardcoat (wHC) Layer

In one or more embodiments, the wet hardcoat layer 150 can be or includeone or more wet hardcoat layers. The wet hardcoat layer 150 can be orinclude one or more acrylates, one or more solgels, one or moresiloxanes, one or more copolymers thereof, one or more elastomersthereof, or any combination thereof. In one or more examples, the wethardcoat layer 150 contains or is an acrylate which can be or include aradiation curable acrylate, aliphatic urethane acrylate, a copolymerthereof, an elastomer thereof, or any combination thereof. For example,the wet hardcoat layer 150 contains or is the thermally-cured acrylateand/or a UV-cured acrylate.

The wet hardcoat layer 150 obtains the “wet” portion of its name due tobeing deposited or otherwise formed by a type of liquid depositionprocess which uses a liquid-type media or starting material. Oncedeposited or otherwise formed, the wet hardcoat layer 150 is a solidlayer which is completely dry or substantially dry. The wet hardcoatlayer 150 can be produced from a gel, a spin-coating, a solution, asuspension, or any combination thereof. In some examples, the gel,solution, or suspension contains one or more solvents, in otherexamples, the gel, solution, or suspension does not contain a solvent,such as being completely or substantially free of a solvent. In one ormore embodiments, the wet hardcoat layer 150 can be formed, treated,and/or otherwise processed on a sheet-to-sheet processing system or aroll-to-roll processing system. For example, the wet hardcoat layer 150can deposited, coated, or otherwise formed on an underlying surface,layer, or device by one or more sheet-to-sheet or roll-to-roll processtechniques.

In one or more embodiments, the wet hardcoat layer 150 contains aplurality of inorganic nanoparticles or other particulate displaced orotherwise disposed within an organic matrix or an inorganic matrix. Insome examples, the wet hardcoat layer 150 contains thermally-cured orUV-cured acrylates or sol-gels with organic matrix interspersed ordistributed with inorganic nano-particles, embedded as fillers orcovalently bonded to the organic matrix. Exemplary inorganic particlescan be or include silica, alumina, titanium oxide, zirconium oxide,hafnium oxide, or any combination thereof. The inorganic particles canbe nanoparticles and have a particle size of about 1 nm to about 500 nm,about 5 nm to about 100 nm, or about 10 nm to about 50 nm. The wethardcoat layer 150 can include about 40 wt %, about 45 wt %, or about 50wt % to about 55 wt %, about 60 wt %, about 65 wt %, about 70 wt %, orabout 75 wt % of the inorganic particles or other particulate. Forexample, the wet hardcoat layer 150 can include about 40 wt % to about75 wt %, about 40 wt % to about 70 wt %, or about 45 wt % to about 65 wt% of the inorganic particles or other particulate.

The wet hardcoat layer 150 has a refractive index of about 1.40, about1.42, about 1.43, about 1.45, or about 1.46 to about 1.48, about 1.50,about 1.51, about 1.52, about 1.54, about 1.55, or greater. For example,the wet hardcoat layer 150 has a refractive index of about 1.40 to about1.55, about 1.40 to about 1.53, about 1.40 to about 1.51, about 1.40 toabout 1.50, about 1.40 to about 1.48, about 1.40 to about 1.46, about1.40 to about 1.45, about 1.40 to about 1.43, about 1.43 to about 1.55,about 1.43 to about 1.53, about 1.43 to about 1.51, about 1.43 to about1.50, about 1.43 to about 1.48, about 1.43 to about 1.46, about 1.43 toabout 1.45, about 1.45 to about 1.55, about 1.45 to about 1.53, about1.45 to about 1.51, about 1.45 to about 1.50, about 1.45 to about 1.48,or about 1.45 to about 1.46. In some examples, the wet hardcoat layer150 has a refractive index of about 1.40 to about 1.55, or about 1.43 toabout 1.51.

The wet hardcoat layer 150 can have a thickness of about 0.1 μm, about0.2 μm, about 0.5 μm, about 0.6 μm, about 0.8 μm, about 1 μm, about 1.2μm, about 1.5 μm, about 1.8 μm, about 2 μm, about 3 μm, about 5 μm,about 10 μm, about 15 μm, or about 20 μm to about 25 μm, about 30 μm,about 35 μm, about 40 μm, about 50 μm, or thicker. For example, the wethardcoat layer 150 can have a thickness of about 0.1 μm to about 50 μm,about 0.1 μm to about 40 μm, about 0.1 μm to about 35 μm, about 0.1 μmto about 30 μm, about 0.1 μm to about 25 μm, about 0.1 μm to about 20μm, about 0.1 μm to about 15 μm, about 0.1 μm to about 10 μm, about 0.1μm to about 5 μm, about 0.1 μm to about 2 μm, about 0.1 μm to about 1μm, about 0.5 μm to about 50 μm, about 0.5 μm to about 40 μm, about 0.5μm to about 35 μm, about 0.5 μm to about 30 μm, about 0.5 μm to about 25μm, about 0.5 μm to about 20 μm, about 0.5 μm to about 10 μm, about 0.5μm to about 5 μm, about 0.5 μm to about 2 μm, about 1 μm to about 50 μm,about 1 μm to about 40 μm, about 1 μm to about 35 μm, about 1 μm toabout 30 μm, about 1 μm to about 25 μm, about 1 μm to about 20 μm, about1 μm to about 10 μm, about 1 μm to about 5 μm, about 1 μm to about 3 μm,about 5 μm to about 50 μm, about 5 μm to about 40 μm, about 5 μm toabout 35 μm, about 5 μm to about 30 μm, about 5 μm to about 25 μm, about5 μm to about 20 μm, about 10 μm to about 50 μm, about 10 μm to about 40μm, about 10 μm to about 35 μm, about 10 μm to about 30 μm, about 10 μmto about 25 μm, or about 10 μm to about 20 μm. In one or more examples,the wet hardcoat layer 150 has a thickness in a range from about 0.5 μmto about 40 μm.

The wet hardcoat layer 150 has a porosity of about 5%, about 6%, about6.5%, about 7%, or about 7.5% to about 8%, about 8.5%, about 9%, about9.5%, about 10%, about 11%, about 12%, or about 15%, as measured usingEllipsometry Porosity. For example, the wet hardcoat layer 150 has aporosity of about 5% to about 12%, about 6% to about 12%, about 6% toabout 11%, about 6% to about 10.5%, about 6% to about 10%, about 6% toabout 9.5%, about 6% to about 9%, about 6% to about 8.5%, about 6% toabout 8%, about 6% to about 7.5%, about 6% to about 7%, about 7% toabout 12%, about 7% to about 11%, about 7% to about 10.5%, about 7% toabout 10%, about 7% to about 9.5%, about 7% to about 9%, about 7% toabout 8.5%, about 7% to about 8%, about 7% to about 7.5%, about 8% toabout 12%, about 8% to about 11%, about 8% to about 10.5%, about 8% toabout 10%, about 8% to about 9.5%, about 8% to about 9%, or about 8% toabout 8.5%, as measured using Ellipsometry Porosity.

The wet hardcoat layer 150 can have a pencil hardness of about 2H, about3H, about 4H, about 5H, or about 6H to about 7H, about 8H, or about 9H,based on the pencil hardness scale. For example, the wet hardcoat layer150 can have a pencil hardness of about 2H to about 9H, about 3H toabout 9H, about 4H to about 9H, about 5H to about 9H, about 6H to about9H, about 7H to about 9H, about 2H to about 8H, about 3H to about 8H,about 4H to about 8H, about 5H to about 8H, about 6H to about 8H, about7H to about 8H, about 2H to about 7H, about 3H to about 7H, about 4H toabout 7H, about 5H to about 7H, about 6H to about 7H, about 6H to about9H, about 7H to about 9H, about 8H to about 9H, about 6H to about 8H, orabout 7H to about 8H, based on the pencil hardness scale. In one or moreexamples, the wet hardcoat layer 150 has a pencil hardness from about 6Hto about 9H.

In one or more embodiments, the wet hardcoat layer 150 can have anano-indentation hardness across a thickness of the wet hardcoat layer150 within a range from about 0.1 GPa, about 0.5 GPa, about 0.8 GPa,about 1 GPa, about 1.2 GPa, about 1.5 GPa, or about 1.8 GPa to about 2GPa, about 2.2 GPa, about 2.5 GPa, about 2.8 GPa, about 3 GPa, about 3.5GPa, about 4 GPa, about 4.5 GPa, about 5 GPa, or greater, as measured bynano-indentation technique, which follows the Oliver-Pharr Indentationmethods for mechanical properties characterization of materials. In someexamples, the wet hardcoat layer 150 can have a nano-indentationhardness across a thickness of the wet hardcoat layer 150 within a rangefrom about 0.1 GPa to about 5 GPa, about 0.5 GPa to about 5 GPa, about 1GPa to about 5 GPa, about 1.5 GPa to about 5 GPa, about 2 GPa to about 5GPa, about 2.5 GPa to about 5 GPa, about 3 GPa to about 5 GPa, about 3.5GPa to about 5 GPa, about 4 GPa to about 5 GPa, about 4.5 GPa to about 5GPa, about 1.5 GPa to about 5 GPa, about 1.5 GPa to about 4.5 GPa, about1.5 GPa to about 4 GPa, about 1.5 GPa to about 3.5 GPa, about 1.5 GPa toabout 3 GPa, about 0.1 GPa to about 4 GPa, about 0.5 GPa to about 4 GPa,about 1 GPa to about 4 GPa, about 1.5 GPa to about 4 GPa, about 2 GPa toabout 4 GPa, about 2.5 GPa to about 4 GPa, about 3 GPa to about 4 GPa,about 3.5 GPa to about 4 GPa, about 0.1 GPa to about 3 GPa, about 0.5GPa to about 3 GPa, about 1 GPa to about 3 GPa, about 1.5 GPa to about 3GPa, about 2 GPa to about 3 GPa, about 2.5 GPa to about 3 GPa, or about1 GPa to about 2 GPa, as measured by nano-indentation technique.

The wet hardcoat layer 150 has a bending inside radius of about 1 mm toabout 5 mm, a bending outside radius of about 5 mm to about 20 mm, atransmittance of about 85% to about 98%, about 88% to about 95%, orabout 90% to about 92%, and a thermal resistance of about −20° C. toabout 80° C. In one or more examples, the wet hardcoat layer 150 can becured using ultraviolet radiation, a thermal curing process, anelectron-beam process and/or vacuum deposition process with plasma. Thewet hardcoat layer 150 can have a transmission of about 90% to about99.99% ASTM D1003, a haze of less than 1% ASTM D10003, and a sandpaperabrasion of less than 0.5% ASTM D1044.

Adhesion Promotion Layer (APL)

The adhesion promotion layer 160 can be or include a single layer or caninclude a plurality of layers. In embodiments were the adhesionpromotion layer 160 contains two or more layers, the adhesion promotionlayer 160 can have a consistent composition across the thickness of thelayer or can have a gradient composition across the thickness. Agradient composition across the thickness provides gradient properties(e.g., hardness, elastic modulus, or carbon concentration) across thethickness of the adhesion promotion layer 160. In one or more examples,the hardness value of the adhesion promotion layer 160 is about 10% toabout 15% of the elastic modulus value of the adhesion promotion layer160.

The adhesion promotion layer 160 contains one or more materials whichcan be or include silicon oxide, silicon carbide, silicon oxycarbide,silicon nitride, silicon oxynitride, silicon oxycarbide nitride, adopant thereof, or any combination thereof. The adhesion promotion layer160 can be deposited or otherwise produced by one or more vapordeposition processes which can be or include PVD, sputtering, CVD,PE-CVD, HDP-CVD, ALD, PE-ALD, other vacuum or vapor depositionprocesses, or any combination thereof. In one or more embodiments, theadhesion promotion layer 160 can be formed, treated, and/or otherwiseprocessed on a sheet-to-sheet processing system or a roll-to-rollprocessing system. For example, the adhesion promotion layer 160 candeposited, coated, or otherwise formed on an underlying surface, layer,or device by one or more sheet-to-sheet or roll-to-roll processtechniques.

In one or more examples, the adhesion promotion layer 160 can bedeposited or otherwise produced from one or more silicon precursors andone or more oxidizing agents during a vapor deposition process. Theratio of the silicon precursor and the oxidizing agent can be adjustedduring the vapor deposition process after depositing each sublayer of astack. These adjustments are used to control the desired gradientproperties. The silicon precursor can be or include one or morealkylsilanes, alkoxysilanes, alkylsiloxanes, alkylsilazanes, or anycombination thereof. The oxidizing agent can be or include oxygen,ozone, plasma oxygen, atomic oxygen, water or vapor, nitrous oxide,peroxide, or any combination thereof.

In one or more examples, the adhesion promotion layer 160 can be anon-gradient layer or film. In other examples, the adhesion promotionlayer 160 can be a gradient layer or film which contains 2 or moresublayers therein. For example, the adhesion promotion layer 160 cancontain 2, 3, 4, or 5 sublayers to 6, 7, 8, 9, 10, or more sublayers. Insome examples, the adhesion promotion layer 160 can contain 2 sublayersto 10 sublayers, 2 sublayers to 8 sublayers, 2 sublayers to 7 sublayers,2 sublayers to 6 sublayers, 2 sublayers to 5 sublayers, 2 sublayers to 4sublayers, 2 sublayers to 3 sublayers, 3 sublayers to 10 sublayers, 3sublayers to 8 sublayers, 3 sublayers to 7 sublayers, 3 sublayers to 6sublayers, 3 sublayers to 5 sublayers, 3 sublayers to 4 sublayers, 4sublayers to 10 sublayers, 4 sublayers to 8 sublayers, 4 sublayers to 7sublayers, 4 sublayers to 6 sublayers, or 4 sublayers to 5 sublayers.

In some embodiments, the adhesion promotion layer 160 has a gradient ofcarbon concentration across a thickness of the adhesion promotion layer160. The adhesion promotion layer 160 contains a plurality of sublayerscontained therein. The adhesion promotion layer 160 can include 2, 3, 4,or 5 sublayers to 6, 7, 8, 9, 10, 12, or more sublayers. In someexamples, the plurality of sublayers contains a gradient of carbonconcentration across a thickness of the adhesion promotion layer 160,and/or a gradient of hardness across a thickness of the adhesionpromotion layer 160, and/or a gradient of elastic modulus across athickness of the adhesion promotion layer 160.

In one or more examples, the adhesion promotion layer 160 contains fivesublayers of varying hardness (H) to produce gradient across thethickness of the adhesion promotion layer 160. In one or more examples,the five sublayers includes: 1^(st) layer: H=about 0.5-0.9 GPa; 2^(nd)layer: H=about 0.8-1.3 GPa; 3^(rd) layer H=about 1.2-2.4 GPa; 4^(th)layer H=about 2.0-2.8 GPa; and 5th layer H=about 2.0-2.9 GPa. In otherexamples, the five sublayers includes: 1^(st) layer: H=about 0.7-0.9GPa; 2^(nd) layer: H=about 1.1-1.3 GPa; 3^(rd) layer H=about 1.9-2.4 GPa(another example H=about 2.2-2.4 GPa); 4^(th) layer H=about 2.6-2.8 GPa;and 5^(th) layer H=about 2.7-2.9 GPa.

In one or more embodiments, each of the plurality of sublayers canindependently have a nano-indentation hardness across a thickness of theadhesion promotion layer 160 within a range from about 0.1 GPa, about0.5 GPa, about 0.8 GPa, or about 1 GPa to about 1.5 GPa, about 2 GPa,about 2.5 GPa, about 3 GPa, about 3.5 GPa, about 4 GPa, about 4.5 GPa,about 5 GPa, or greater, as measured by nano-indentation technique,which follows the Oliver-Pharr Indentation methods for mechanicalproperties characterization of materials. In some examples, each of theplurality of sublayers can independently have a nano-indentationhardness across a thickness of the adhesion promotion layer 160 within arange from about 0.1 GPa to about 5 GPa, about 0.1 GPa to about 4 GPa,about 0.1 GPa to about 3 GPa, about 0.1 GPa to about 2 GPa, about 0.1GPa to about 1 GPa, about 0.1 GPa to about 5 GPa, about 0.5 GPa to about4.5 GPa, about 0.5 GPa to about 4 GPa, about 0.5 GPa to about 3.5 GPa,about 0.5 GPa to about 3 GPa, about 0.5 GPa to about 2.5 GPa, about 0.5GPa to about 2 GPa, about 0.5 GPa to about 1.5 GPa, about 0.5 GPa toabout 1 GPa, about 1 GPa to about 5 GPa, about 1 GPa to about 4 GPa,about 1 GPa to about 3 GPa, or about 1 GPa to about 2 GPa, as measuredby nano-indentation technique.

The adhesion promotion layer 160 has a refractive index of about 1.35,about 1.38, about 1.40, about 1.42, about 1.43, about 1.45, or about1.46 to about 1.48, about 1.50, about 1.51, about 1.52, about 1.54,about 1.55, or greater. For example, the adhesion promotion layer 160has a refractive index of about 1.40 to about 1.55, about 1.40 to about1.53, about 1.40 to about 1.51, about 1.40 to about 1.50, about 1.40 toabout 1.48, about 1.40 to about 1.46, about 1.40 to about 1.45, about1.40 to about 1.43, about 1.43 to about 1.55, about 1.43 to about 1.53,about 1.43 to about 1.51, about 1.43 to about 1.50, about 1.43 to about1.48, about 1.43 to about 1.46, about 1.43 to about 1.45, about 1.45 toabout 1.55, about 1.45 to about 1.53, about 1.45 to about 1.51, about1.45 to about 1.50, about 1.45 to about 1.48, or about 1.45 to about1.46. In some examples, the adhesion promotion layer 160 has arefractive index of about 1.40 to about 1.55, or about 1.43 to about1.51.

The adhesion promotion layer 160 has a thickness of about 0.01 μm, about0.02 μm, about 0.04 μm, about 0.08 μm, about 0.1 μm, about 0.2 μm, about0.5 μm, about 0.8 μm, or about 1 μm to about 1.5 μm, about 2 μm, about 5μm, about 8 μm, about 10 μm, about 15 μm, about 20 μm, about 25 μm,about 30 μm, about 35 μm, about 40 μm, about 50 μm, or greater. Theadhesion promotion layer 160 has a thickness in a range from about 0.01μm to about 50 μm, about 0.04 μm to about 50 μm, about 0.04 μm to about30 μm, about 0.04 μm to about 20 μm, about 0.04 μm to about 10 μm, about0.04 μm to about 8 μm, about 0.04 μm to about 5 μm, about 0.04 μm toabout 1 μm, about 0.04 μm to about 0.1 μm, about 0.1 μm to about 30 μm,about 0.1 μm to about 20 μm, about 0.1 μm to about 10 μm, about 0.1 μmto about 8 μm, about 0.1 μm to about 5 μm, about 0.1 μm to about 1 μm,about 1 μm to about 30 μm, about 1 μm to about 20 μm, about 1 μm toabout 10 μm, about 1 μm to about 8 μm, about 1 μm to about 5 μm, orabout 1 μm to about 3 μm.

FIG. 24 depicts a schematic, cross-sectional view of an adhesionpromotion layer (APL) 260 containing a plurality of sublayers 210, 212,214, 216, 218, 220, 222, 224, 226, and 228, according to one or moreembodiments described and discussed herein. In one or more embodiments,the adhesion promotion layer 260 can be substituted for the adhesionpromotion layer 160 in any embodiment described and discussed herein.Although the adhesion promotion layer 260 is shown with ten sublayers(sublayers 210, 212, 214, 216, 218, 220, 222, 224, 226, and 228)—theadhesion promotion layer 260 can include 2, 3, 4, or 5 sublayers to 6,7, 8, 9, 10, 12, or more sublayers. In some examples, the plurality ofsublayers contains a gradient of carbon concentration across a thicknessof the adhesion promotion layer 260 and/or a gradient of hardness acrossa thickness of the adhesion promotion layer 260. The carbonconcentration can vary across the thickness of the adhesion promotionlayer 260 by decreasing the carbon content from the bottom or lowestlayer to the top or highest layer within the plurality of sublayers.

In some examples of the adhesion promotion layer 260, the carbon contentof the bottom or lowest layer can be about 20 atomic percent (at %) toabout 65 at % and the carbon content of the top or highest layer can beabout 5 at % to about 15 at %. In one or more examples of the adhesionpromotion layer 260 containing five sublayers (Layers 1-5 from bottom totop, respectively), the plurality of sublayers include the followingcarbon concentrations: Layer 1 about 20 at % to about 65 at % (anotherexample about 20 at % to about 43 at %); Layer 2 about 15 at % to about35 at %; Layer 3 about 10 at % to about 30 at %; Layer 4 about 7 at % toabout 20 at %; and Layer 5 about 5 at % to about 15 at %. The carboncontent can be measured using X-ray Photoelectron Spectroscopy (XPS)elemental analysis technique.

Anti-Reflectance (ARF) Layer

The anti-reflectance layer 170 contains one or more layers for reducingor prohibiting light reflection. The anti-reflectance layer 170 containsone or more materials which can be or include silicon nitride, siliconoxynitride, silicon carbide nitride, silicon oxycarbide nitride, adopant thereof, or any combination thereof. The anti-reflectance layer170 can be deposited or otherwise produced from one or more vapordeposition processes. For example, the anti-reflectance layer 170 isdeposited or produced from a vapor deposition process which can be orinclude sputtering, PVD, CVD, PE-CVD, HDP-CVD, ALD, PE-ALD, other vacuumor vapor deposition processes, or any combination thereof. In one ormore examples, the anti-reflectance layer 170 contains silicon nitridedeposited by one or more vapor deposition processes. In one or moreembodiments, the anti-reflectance layer 170 can be formed, treated,and/or otherwise processed on a sheet-to-sheet processing system or aroll-to-roll processing system. For example, the anti-reflectance layer170 can deposited, coated, or otherwise formed on an underlying surface,layer, or device by one or more sheet-to-sheet or roll-to-roll processtechniques.

In some examples, the anti-reflectance layer 170 is formed or otherwisedeposited by a vapor deposition process using one or more of thefollowing precursors: one or more organic polymer precursors (liquidand/or gas), hexamethyldisiloxane (HMDSO), ppHMDSO, tetramethylcyclotetrasiloxane (TOMCAT), hexamethyldisilazane (HMDSN), tetraethylorthosilicate (TEOS), silane, disilane, trisilane, or any combinationthereof. In other examples, the anti-reflectance layer 170 is formed orotherwise deposited by a sputtering process using silica or quartz.

The anti-reflectance layer 170 has a refractive index of about 1.5,about 1.7, about 1.8, about 1.9, or about 2.0 to about 2.1, about 2.2,about 2.3, about 2.4, or about 2.5. For example, the anti-reflectancelayer 170 has a refractive index of about 1.5 to about 2.5, about 1.5 toabout 2.3, about 1.5 to about 2.1, about 1.5 to about 2.0, about 1.5 toabout 1.8, about 1.5 to about 1.7, about 1.7 to about 2.5, about 1.7 toabout 2.3, about 1.7 to about 2.1, about 1.7 to about 2.0, about 1.8 toabout 2.5, about 1.8 to about 2.3, about 1.8 to about 2.1, about 1.8 toabout 2.0, about 2.0 to about 2.5, or about 2.0 to about 2.3.

The anti-reflectance layer 170 has a thickness of about 0.5 nm, about 1nm, about 2 nm, about 3 nm, about 4 nm, about 5 nm, about 8 nm, about 10nm, about 20 nm, about 30 nm, about 40 nm, or about 50 nm to about 60nm, about 80 nm, about 100 nm, about 120 nm, about 150 nm, about 180 nm,about 200 nm, about 250 nm, or greater. For example, theanti-reflectance layer 170 has a thickness of about 2 nm to about 250nm, about 2 nm to about 200 nm, about 2 nm to about 150 nm, about 2 nmto about 100 nm, about 2 nm to about 80 nm, about 2 nm to about 50 nm,about 2 nm to about 30 nm, about 2 nm to about 25 nm, about 2 nm toabout 20 nm, about 2 nm to about 15 nm, about 2 nm to about 10 nm, about2 nm to about 8 nm, about 5 nm to about 250 nm, about 5 nm to about 200nm, about 5 nm to about 150 nm, about 5 nm to about 100 nm, about 5 nmto about 80 nm, about 5 nm to about 50 nm, about 5 nm to about 30 nm,about 5 nm to about 25 nm, about 5 nm to about 20 nm, about 5 nm toabout 15 nm, about 5 nm to about 10 nm, about 5 nm to about 8 nm, about20 nm to about 250 nm, about 20 nm to about 200 nm, about 20 nm to about150 nm, about 20 nm to about 100 nm, about 20 nm to about 80 nm, about20 nm to about 50 nm, about 20 nm to about 30 nm, about 50 nm to about250 nm, about 50 nm to about 200 nm, about 50 nm to about 150 nm, about50 nm to about 100 nm, or about 50 nm to about 80 nm.

The anti-reflectance layer 170 has an optical transmission in thevisible range within a range from about 82%, about 85%, about 86%, about88%, or about 90% to about 92%, about 94%, about 95%, about 96%, about97%, about 98%, or about 99%. For example, the anti-reflectance layer170 has an optical transmission in the visible range within a range fromabout 82% to about 99%, about 85% to about 99%, about 88% to about 99%,about 90% to about 99%, about 92% to about 99%, about 95% to about 99%,about 97% to about 99%, about 82% to about 98%, about 85% to about 98%,about 88% to about 98%, about 90% to about 98%, about 92% to about 98%,about 95% to about 98%, about 97% to about 98%, about 82% to about 96%,about 85% to about 96%, about 88% to about 96%, about 90% to about 96%,about 92% to about 96%, or about 95% to about 96%.

Second or Dry Hardcoat (dHC) Layer

In one or more embodiments, the dry hardcoat layer 180 can be or includeone or more dry hardcoat layers. The dry hardcoat layer 180 contains oneor more materials which can be or include silicon oxide, siliconcarbide, silicon oxycarbide, silicon nitride, silicon oxynitride,silicon oxycarbide nitride, a dopant thereof, or any combinationthereof. In some examples of the dry hardcoat layer 180 containingcarbon, the carbon content can be from about 1 at %, about 2 at %, about3 at %, about 4 at %, about 5 at %, or about 6 at % to about 7 at %,about 8 at %, about 10 at %, about 12 at %, about 15 at %, about 18 at%, or about 20 at %. For example, the dry hardcoat layer 180 can have acarbon content of about 1 at % to about 20 at %, about 5 at % to about15 at %, about 5 at % to about 10 at %, about 8 at % to about 20 at %,or about 8 at % to about 12 at %. The carbon content can be measuredusing X-ray Photoelectron Spectroscopy (XPS) elemental analysistechnique.

The dry hardcoat layer 180 obtains the “dry” portion of its name due tobeing formed by one or more types of vapor deposition processes. Oncedeposited or otherwise formed, the dry hardcoat layer 180 is a solidlayer which is completely dry or substantially dry. The dry hardcoatlayer 180 is deposited, formed, or otherwise produced from a vapordeposition process which can be or include PVD, CVD, PE-CVD, HDP-CVD,ALD, PE-ALD, other vacuum or vapor deposition processes, or anycombination thereof. In some examples, the dry hardcoat layer 180 isproduced, deposited coated, or otherwise formed by a vacuum processing,atmospheric processing, solution processing, or other deposition orcoating techniques, and then optionally treated or cured with a thermaland/or UV exposure. In one or more embodiments, the dry hardcoat layer180 can be formed, treated, and/or otherwise processed on asheet-to-sheet processing system or a roll-to-roll processing system.For example, the dry hardcoat layer 180 can deposited, coated, orotherwise formed on an underlying surface, layer, or device by one ormore sheet-to-sheet or roll-to-roll process techniques.

The dry hardcoat layer 180 has a refractive index of about 1.40, about1.42, about 1.43, about 1.45, or about 1.46 to about 1.48, about 1.50,about 1.51, about 1.52, about 1.54, about 1.55, or greater. For example,the dry hardcoat layer 180 has a refractive index of about 1.40 to about1.55, about 1.40 to about 1.53, about 1.40 to about 1.51, about 1.40 toabout 1.50, about 1.40 to about 1.48, about 1.40 to about 1.46, about1.40 to about 1.45, about 1.40 to about 1.43, about 1.43 to about 1.55,about 1.43 to about 1.53, about 1.43 to about 1.51, about 1.43 to about1.50, about 1.43 to about 1.48, about 1.43 to about 1.46, about 1.43 toabout 1.45, about 1.45 to about 1.55, about 1.45 to about 1.53, about1.45 to about 1.51, about 1.45 to about 1.50, about 1.45 to about 1.48,or about 1.45 to about 1.46. In some examples, the dry hardcoat layer180 has a refractive index of about 1.42 to about 1.55, or about 1.45 toabout 1.51.

The dry hardcoat layer 180 can have a thickness of about 0.1 μm, about0.2 μm, about 0.5 μm, about 0.6 μm, about 0.8 μm, about 1 μm, about 1.2μm, about 1.5 μm, about 1.8 μm, about 2 μm, about 3 μm, about 5 μm,about 10 μm, about 15 μm, or about 20 μm to about 25 μm, about 30 μm,about 35 μm, about 40 μm, about 50 μm, or thicker. For example, the dryhardcoat layer 180 can have a thickness of about 0.1 μm to about 50 μm,about 0.1 μm to about 40 μm, about 0.1 μm to about 35 μm, about 0.1 μmto about 30 μm, about 0.1 μm to about 25 μm, about 0.1 μm to about 20μm, about 0.1 μm to about 15 μm, about 0.1 μm to about 10 μm, about 0.1μm to about 5 μm, about 0.1 μm to about 2 μm, about 0.1 μm to about 1μm, about 0.5 μm to about 50 μm, about 0.5 μm to about 40 μm, about 0.5μm to about 35 μm, about 0.5 μm to about 30 μm, about 0.5 μm to about 25μm, about 0.5 μm to about 20 μm, about 0.5 μm to about 10 μm, about 0.5μm to about 5 μm, about 0.5 μm to about 2 μm, about 1 μm to about 50 μm,about 1 μm to about 40 μm, about 1 μm to about 35 μm, about 1 μm toabout 30 μm, about 1 μm to about 25 μm, about 1 μm to about 20 μm, about1 μm to about 10 μm, about 1 μm to about 5 μm, about 1 μm to about 3 μm,about 5 μm to about 50 μm, about 5 μm to about 40 μm, about 5 μm toabout 35 μm, about 5 μm to about 30 μm, about 5 μm to about 25 μm, about5 μm to about 20 μm, about 10 μm to about 50 μm, about 10 μm to about 40μm, about 10 μm to about 35 μm, about 10 μm to about 30 μm, about 10 μmto about 25 μm, or about 10 μm to about 20 μm. In one or more examples,the dry hardcoat layer 180 has a thickness in a range from about 0.5 μmto about 40 μm.

The dry hardcoat layer 180 has a porosity of about 0.5%, about 1%, about1.5%, about 2%, about 2.5%, or about 3% to about 3.5%, about 4%, about4.5%, about 5%, about 5.5%, about 6%, about 6.5%, about 7%, or about 8%,as measured using Ellipsometry Porosity. For example, the dry hardcoatlayer 180 has a porosity of about 0.5% to about 8%, about 1% to about8%, about 1% to about 7%, about 1% to about 6.5%, about 1% to about 6%,about 1% to about 5.5%, about 1% to about 5%, about 1% to about 4.5%,about 1% to about 4%, about 1% to about 3.5%, about 1% to about 3%,about 1% to about 2.5%, about 1% to about 2%, about 2% to about 8%,about 2% to about 7%, about 2% to about 6.5%, about 2% to about 6%,about 2% to about 5.5%, about 2% to about 5%, about 2% to about 4.5%,about 2% to about 4%, about 2% to about 3.5%, about 2% to about 3%,about 2% to about 2.5%, about 3% to about 8%, about 3% to about 7%,about 3% to about 6.5%, about 3% to about 6%, about 3% to about 5.5%,about 3% to about 5%, about 3% to about 4.5%, about 3% to about 4%, orabout 3% to about 3.5%, as measured using Ellipsometry Porosity.

In one or more examples, the dry hardcoat layer 180 has a porosity ofabout 0.5% to less than 7% and the wet hardcoat layer 150 has a porosityof 7% to about 12%. In other examples, the dry hardcoat layer 180 has aporosity of about 0.5% to less than 6% and the wet hardcoat layer 150has a porosity of 6% to about 12%. In some examples, the dry hardcoatlayer 180 has a porosity of about 1% to less than 7% and the wethardcoat layer 150 has a porosity of 7% to about 10%. In other examples,the dry hardcoat layer 180 has a porosity of about 1% to less than 6%and the wet hardcoat layer 150 has a porosity of 6% to about 10%.

The dry hardcoat layer 180 can have a pencil hardness of about 2H, about3H, about 4H, about 5H, or about 6H to about 7H, about 8H, or about 9H,based on the pencil hardness scale. For example, the dry hardcoat layer180 can have a pencil hardness of about 2H to about 9H, about 3H toabout 9H, about 4H to about 9H, about 5H to about 9H, about 6H to about9H, about 7H to about 9H, about 2H to about 8H, about 3H to about 8H,about 4H to about 8H, about 5H to about 8H, about 6H to about 8H, about7H to about 8H, about 2H to about 7H, about 3H to about 7H, about 4H toabout 7H, about 5H to about 7H, about 6H to about 7H, about 6H to about9H, about 7H to about 9H, about 8H to about 9H, about 6H to about 8H, orabout 7H to about 8H, based on the pencil hardness scale. In one or moreexamples, the dry hardcoat layer 180 has a pencil hardness from about 6Hto about 9H.

In one or more embodiments, the dry hardcoat layer 180 can have anano-indentation hardness across a thickness of dry hardcoat layer 180within a range from about 0.1 GPa, about 0.5 GPa, about 0.8 GPa, about 1GPa, about 1.2 GPa, about 1.5 GPa, or about 1.8 GPa to about 2 GPa,about 2.2 GPa, about 2.5 GPa, about 2.8 GPa, about 3 GPa, about 3.5 GPa,about 4 GPa, about 4.5 GPa, about 5 GPa, or greater, as measured bynano-indentation technique, which follows the Oliver-Pharr Indentationmethods for mechanical properties characterization of materials. In someexamples, the dry hardcoat layer 180 can have a nano-indentationhardness across a thickness of the dry hardcoat layer 180 within a rangefrom about 0.1 GPa to about 5 GPa, about 0.5 GPa to about 5 GPa, about 1GPa to about 5 GPa, about 1.5 GPa to about 5 GPa, about 2 GPa to about 5GPa, about 2.5 GPa to about 5 GPa, about 3 GPa to about 5 GPa, about 3.5GPa to about 5 GPa, about 4 GPa to about 5 GPa, about 4.5 GPa to about 5GPa, about 0.1 GPa to about 4 GPa, about 0.5 GPa to about 4 GPa, about 1GPa to about 4 GPa, about 1.5 GPa to about 4 GPa, about 2 GPa to about 4GPa, about 2.5 GPa to about 4 GPa, about 3 GPa to about 4 GPa, about 3.5GPa to about 4 GPa, about 0.1 GPa to about 3 GPa, about 0.5 GPa to about3 GPa, about 1 GPa to about 3 GPa, about 1.5 GPa to about 3 GPa, about 2GPa to about 3 GPa, about 2.5 GPa to about 3 GPa, about 1 GPa to about 2GPa, about 0.4 GPa to about 3 GPa, about 0.4 GPa to about 1.5 GPa, about0.4 GPa to about 1.2 GPa, about 0.5 GPa to about 2 GPa, about 0.5 GPa toabout 1.2 GPa, or about 0.5 GPa to about 1 GPa, as measured bynano-indentation technique.

The dry hardcoat layer 180 has a bending inside radius of about 1 mm toabout 5 mm, a bending outside radius of about 5 mm to about 20 mm, atransmittance of about 85% to about 98%, about 88% to about 95%, orabout 90% to about 92%, and a thermal resistance of about −20° C. toabout 80° C. In one or more examples, the dry hardcoat layer 180 can becured using ultraviolet radiation, an electron-beam process and/orvacuum deposition process with plasma. The dry hardcoat layer 180 canhave a transmission of about 90% to about 99.99% ASTM D1003, a haze ofless than 1% ASTM D10003, and a sandpaper abrasion of less than 0.5%ASTM D1044.

Anti-Fingerprint Coating (AFC) Layer

The anti-fingerprint coating layer 190, also known as an anti-smudgelayer, containing one or more layers, films, or coatings and provides anoverall upper surface for the flexible cover lens assembly 202 or otherflexible cover lens assemblies described and discussed herein. Theanti-fingerprint coating layer 190 reduces or prohibits fingerprints,smudges, marring, and other contaminants on the outer and/or uppersurfaces of the anti-fingerprint coating layer 190. The anti-fingerprintcoating layer 190 contains one or more materials which can be or includea fluorosilane, a perfluoropolyether-containing silane polymer, achlorosilane, an oxysilane, a fluoroethylene, a perfluoropolyether, anitrogen fluoride or nitrogen-fluorine containing compound, a polymerthereof, a dopant thereof, or any combination thereof.

The anti-fingerprint coating layer 190 is deposited or otherwiseproduced by one or more deposition processes which can be or includePVD, ion beam evaporation, CVD, spin coating, spray coating, dipcoating, thermal curing, or any combination thereof. In one or moreembodiments, the anti-fingerprint coating layer 190 can be formed,treated, and/or otherwise processed on a sheet-to-sheet processingsystem or a roll-to-roll processing system. For example, theanti-fingerprint coating layer 190 can deposited, coated, or otherwiseformed on an underlying surface, layer, or device by one or moresheet-to-sheet or roll-to-roll process techniques.

The anti-fingerprint coating layer 190 has a surface energy of about 5dyne/cm, about 10 dyne/cm, about 15 dyne/cm, about 18 dyne/cm, or about20 dyne/cm to about 25 dyne/cm, about 30 dyne/cm, about 40 dyne/cm,about 50 dyne/cm, about 60 dyne/cm, about 70 dyne/cm, about 80 dyne/cm,or about 100 dyne/cm. For example, the anti-fingerprint coating layer190 has a surface energy within a range from about 5 dyne/cm to about100 dyne/cm, about 5 dyne/cm to about 80 dyne/cm, about 5 dyne/cm toabout 70 dyne/cm, about 5 dyne/cm to about 50 dyne/cm, about 5 dyne/cmto about 40 dyne/cm, about 5 dyne/cm to about 30 dyne/cm, about 5dyne/cm to about 20 dyne/cm, about 10 dyne/cm to about 100 dyne/cm,about 10 dyne/cm to about 80 dyne/cm, about 10 dyne/cm to about 70dyne/cm, about 10 dyne/cm to about 50 dyne/cm, about 10 dyne/cm to about40 dyne/cm, about 10 dyne/cm to about 30 dyne/cm, about 10 dyne/cm toabout 20 dyne/cm, about 30 dyne/cm to about 100 dyne/cm, about 30dyne/cm to about 80 dyne/cm, about 30 dyne/cm to about 70 dyne/cm, about30 dyne/cm to about 50 dyne/cm, or about 30 dyne/cm to about 40 dyne/cm.

The anti-fingerprint coating layer 190 has a thickness of about 0.5 nm,about 1 nm, about 2 nm, about 3 nm, about 4 nm, about 5 nm, about 8 nm,or about 10 nm to about 12 nm, about 15 nm, about 18 nm, about 20 nm,about 25 nm, about 30 nm, about 35 nm, about 40 nm, about 50 nm, about60 nm, about 80 nm, about 100 nm, or greater. For example, theanti-fingerprint coating layer 190 has a thickness of about 1 nm toabout 100 nm, about 1 nm to about 80 nm, about 1 nm to about 50 nm,about 1 nm to about 40 nm, about 1 nm to about 35 nm, about 1 nm toabout 30 nm, about 1 nm to about 25 nm, about 1 nm to about 20 nm, about1 nm to about 15 nm, about 1 nm to about 10 nm, about 1 nm to about 8nm, about 1 nm to about 5 nm, about 3 nm to about 100 nm, about 3 nm toabout 80 nm, about 3 nm to about 50 nm, about 3 nm to about 40 nm, about3 nm to about 35 nm, about 3 nm to about 30 nm, about 3 nm to about 25nm, about 3 nm to about 20 nm, about 3 nm to about 15 nm, about 3 nm toabout 10 nm, about 3 nm to about 8 nm, about 3 nm to about 5 nm, about 5nm to about 100 nm, about 5 nm to about 80 nm, about 5 nm to about 50nm, about 5 nm to about 40 nm, about 5 nm to about 35 nm, about 5 nm toabout 30 nm, about 5 nm to about 25 nm, about 5 nm to about 20 nm, about5 nm to about 15 nm, about 5 nm to about 10 nm, about 5 nm to about 8nm, about 10 nm to about 100 nm, about 10 nm to about 80 nm, about 10 nmto about 50 nm, about 10 nm to about 40 nm, about 10 nm to about 35 nm,about 10 nm to about 30 nm, about 10 nm to about 25 nm, about 10 nm toabout 20 nm, about 10 nm to about 15 nm, about 20 nm to about 50 nm,about 20 nm to about 30 nm, about 50 nm to about 250 nm, about 50 nm toabout 200 nm, about 50 nm to about 150 nm, about 50 nm to about 100 nm,or about 50 nm to about 80 nm.

FIG. 2 depicts a schematic, cross-sectional view of a display device 200containing a flexible cover lens assembly 202 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 202 contains the moisture barrier layer130, the impact absorption layer 120 disposed on the moisture barrierlayer 130, and the substrate 140 disposed on the impact absorption layer120, and the wet hardcoat layer 150 disposed on the substrate 140. Theflexible cover lens assembly 202 also contains the adhesion promotionlayer 160 disposed on the wet hardcoat layer 150, the anti-reflectancelayer 170 disposed on the adhesion promotion layer 160, the dry hardcoatlayer 180 disposed on the anti-reflectance layer 170, and theanti-fingerprint coating layer 190 disposed on the dry hardcoat layer180. In some examples, the impact absorption layer 120 is disposedbetween and in contact with the moisture barrier layer 130 and thesubstrate 140.

FIG. 3 depicts a schematic, cross-sectional view of a display device 300containing a flexible cover lens assembly 302 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 302 contains the moisture barrier layer130, the impact absorption layer 120 disposed on the moisture barrierlayer 130, the substrate 140 disposed on the impact absorption layer120, and the adhesion promotion layer 160 disposed on the substrate 140.The flexible cover lens assembly 302 also contains the anti-reflectancelayer 170 disposed on the adhesion promotion layer 160, the dry hardcoatlayer 180 disposed on the anti-reflectance layer 170, and theanti-fingerprint coating layer 190 disposed on the dry hardcoat layer180.

FIG. 4 depicts a schematic, cross-sectional view of a display device 400containing a flexible cover lens assembly 402 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 402 contains the moisture barrier layer130, the substrate 140 disposed on the moisture barrier layer 130, andthe wet hardcoat layer 150 disposed on the substrate 140. The flexiblecover lens assembly 402 also contains the adhesion promotion layer 160disposed on the wet hardcoat layer 150, the anti-reflectance layer 170disposed on the adhesion promotion layer 160, the dry hardcoat layer 180disposed on the anti-reflectance layer 170, and the anti-fingerprintcoating layer 190 disposed on the dry hardcoat layer 180.

FIG. 5 depicts a schematic, cross-sectional view of a display device 500containing a flexible cover lens assembly 502 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 502 contains the glass layer 110, theimpact absorption layer 120 disposed on the glass layer 110, thesubstrate 140 disposed on the impact absorption layer 120, and the wethardcoat layer 150 disposed on the substrate 140. The flexible coverlens assembly 502 also contains the adhesion promotion layer 160disposed on the wet hardcoat layer 150, the anti-reflectance layer 170disposed on the adhesion promotion layer 160, the dry hardcoat layer 180disposed on the anti-reflectance layer 170, and the anti-fingerprintcoating layer 190 disposed on the dry hardcoat layer 180. In someexamples, the wet hardcoat layer 150 is disposed between and in contactwith the substrate 140 and the adhesion promotion layer 160.

FIG. 6 depicts a schematic, cross-sectional view of a display device 600containing a flexible cover lens assembly 602 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 602 contains the impact absorption layer120, the glass layer 110 disposed on the impact absorption layer 120,the substrate 140 disposed on the glass layer 110, and the wet hardcoatlayer 150 disposed on the substrate 140. The flexible cover lensassembly 602 also contains the adhesion promotion layer 160 disposed onthe wet hardcoat layer 150, the anti-reflectance layer 170 disposed onthe adhesion promotion layer 160, the dry hardcoat layer 180 disposed onthe anti-reflectance layer 170, and the anti-fingerprint coating layer190 disposed on the dry hardcoat layer 180. In one or more examples, theglass layer 110 is disposed between and in contact with the impactabsorption layer 120 and the substrate 140.

FIG. 7 depicts a schematic, cross-sectional view of a display device 700containing a flexible cover lens assembly 702 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 702 contains the glass layer 110, theimpact absorption layer 120 disposed on the glass layer 110, thesubstrate 140 disposed on the impact absorption layer 120, and theadhesion promotion layer 160 disposed on the substrate 140. The flexiblecover lens assembly 702 also contains the anti-reflectance layer 170disposed on the adhesion promotion layer 160, the dry hardcoat layer 180disposed on the anti-reflectance layer 170, and the anti-fingerprintcoating layer 190 disposed on the dry hardcoat layer 180.

FIG. 8 depicts a schematic, cross-sectional view of a display device 800containing a flexible cover lens assembly 802 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 802 contains the impact absorption layer120, the substrate 140 disposed on the impact absorption layer 120, thewet hardcoat layer 150 disposed on the substrate 140, and the adhesionpromotion layer 160 disposed on the wet hardcoat layer 150. The flexiblecover lens assembly 802 also contains the anti-reflectance layer 170disposed on the adhesion promotion layer 160, the dry hardcoat layer 180disposed on the anti-reflectance layer 170, and the anti-fingerprintcoating layer 190 disposed on the dry hardcoat layer 180.

FIG. 9 depicts a schematic, cross-sectional view of a display device 900containing a flexible cover lens assembly 902 disposed on the FDS 104,according to one or more embodiments described and discussed herein. Theflexible cover lens assembly 902 contains the glass layer 110, thesubstrate 140 disposed on the substrate 140, the wet hardcoat layer 150disposed on the substrate 140, and the adhesion promotion layer 160disposed on the wet hardcoat layer 150. The flexible cover lens assembly902 also contains the anti-reflectance layer 170 disposed on theadhesion promotion layer 160, the dry hardcoat layer 180 disposed on theanti-reflectance layer 170, and the anti-fingerprint coating layer 190disposed on the dry hardcoat layer 180.

FIG. 10 depicts a schematic, cross-sectional view of a display device1000 containing a flexible cover lens assembly 1002 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1002 contains the substrate140, the wet hardcoat layer 150 disposed on the substrate 140, and theadhesion promotion layer 160 disposed on the wet hardcoat layer 150. Theflexible cover lens assembly 1002 also contains the anti-reflectancelayer 170 disposed on the adhesion promotion layer 160, the dry hardcoatlayer 180 disposed on the anti-reflectance layer 170, and theanti-fingerprint coating layer 190 disposed on the dry hardcoat layer180.

FIG. 11 depicts a schematic, cross-sectional view of a display device1100 containing a flexible cover lens assembly 1102 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1102 contains the glass layer110, the substrate 140 disposed on the glass layer 110, and the adhesionpromotion layer 160 disposed on the substrate 140. The flexible coverlens assembly 1102 also contains the anti-reflectance layer 170 disposedon the adhesion promotion layer 160, the dry hardcoat layer 180 disposedon the anti-reflectance layer 170, and the anti-fingerprint coatinglayer 190 disposed on the dry hardcoat layer 180. In some examples, thesubstrate 140 is disposed between and in contact with the glass layer110 and the adhesion promotion layer 160.

FIG. 12 depicts a schematic, cross-sectional view of a display device1200 containing a flexible cover lens assembly 1202 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1202 contains the glass layer110, the substrate 140 disposed on the glass layer 110, and the wethardcoat layer 150 disposed on the substrate 140. The flexible coverlens assembly 1202 also contains the anti-reflectance layer 170 disposedon the wet hardcoat layer 150, the adhesion promotion layer 160 disposedon the anti-reflectance layer 170, and the anti-fingerprint coatinglayer 190 disposed on the adhesion promotion layer 160.

FIG. 13 depicts a schematic, cross-sectional view of a display device1300 containing a flexible cover lens assembly 1302 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1302 contains the glass layer110, the adhesion promotion layer 160 disposed on the glass layer 110,the anti-reflectance layer 170 disposed on the adhesion promotion layer160, the dry hardcoat layer 180 disposed on the anti-reflectance layer170, and the anti-fingerprint coating layer 190 disposed on the dryhardcoat layer 180. In some examples, the adhesion promotion layer 160is disposed between and in contact with the glass layer 110 and theanti-reflectance layer 170.

FIG. 14 depicts a schematic, cross-sectional view of a display device1400 containing a flexible cover lens assembly 1402 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1402 contains the adhesionpromotion layer 160, the anti-reflectance layer 170 disposed on theadhesion promotion layer 160, the dry hardcoat layer 180 disposed on theanti-reflectance layer 170, and the anti-fingerprint coating layer 190disposed on the dry hardcoat layer 180.

FIG. 15 depicts a schematic, cross-sectional view of a display device1500 containing a flexible cover lens assembly 1502 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1502 contains the glass layer110, the substrate 140 disposed on the glass layer 110, the wet hardcoatlayer 150 is disposed on the substrate 140, and the adhesion promotionlayer 160 disposed on the wet hardcoat layer 150. The flexible coverlens assembly 1502 also contains the dry hardcoat layer 180 disposed onthe adhesion promotion layer 160 and the anti-fingerprint coating layer190 disposed on the dry hardcoat layer 180. In one or more examples, thewet hardcoat layer 150 is disposed between and in contact with thesubstrate 140 and the adhesion promotion layer 160.

FIG. 16 depicts a schematic, cross-sectional view of a display device1600 containing a flexible cover lens assembly 1602 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1602 contains the glass layer110, the substrate 140 disposed on the glass layer 110, the adhesionpromotion layer 160 disposed on the substrate 140, the dry hardcoatlayer 180 disposed on the adhesion promotion layer 160, and theanti-fingerprint coating layer 190 disposed on the dry hardcoat layer180. In one or more examples, the substrate 140 is disposed between andin contact with the glass layer 110 and the adhesion promotion layer160.

FIG. 17 depicts a schematic, cross-sectional view of a display device1700 containing a flexible cover lens assembly 1702 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1702 contains the glass layer110, the adhesion promotion layer 160 disposed on the glass layer 110,the dry hardcoat layer 180 disposed on the adhesion promotion layer 160,and the anti-fingerprint coating layer 190 disposed on the dry hardcoatlayer 180.

FIG. 18 depicts a schematic, cross-sectional view of a display device1800 containing a flexible cover lens assembly 1802 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1802 contains the substrate140, a wet hardcoat layer 150 disposed on the substrate 140, theadhesion promotion layer 160 disposed on the wet hardcoat layer 150, thedry hardcoat layer 180 disposed on the adhesion promotion layer 160, andthe anti-fingerprint coating layer 190 disposed on the dry hardcoatlayer 180.

FIG. 19 depicts a schematic, cross-sectional view of a display device1900 containing a flexible cover lens assembly 1902 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 1902 contains the substrate140, the anti-fingerprint coating layer 190, and the adhesion promotionlayer 160 disposed between the substrate 140 and the anti-fingerprintcoating layer 190.

FIG. 20 depicts a schematic, cross-sectional view of a display device2000 containing a flexible cover lens assembly 2002 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 2002 contains the substrate140, the adhesion promotion layer 160 disposed on the substrate 140, thedry hardcoat layer 180 disposed on the adhesion promotion layer 160, andthe anti-fingerprint coating layer 190 disposed on the dry hardcoatlayer 180. In some examples, the adhesion promotion layer 160 and/or thedry hardcoat layer 180 are disposed between the substrate 140 and theanti-fingerprint coating layer 190. Also, the dry hardcoat layer 180 isdisposed between and in contact with the adhesion promotion layer 160and the anti-fingerprint coating layer 190.

FIG. 21 depicts a schematic, cross-sectional view of a display device2100 containing a flexible cover lens assembly 2102 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 2002 contains theanti-fingerprint coating layer 190, the adhesion promotion layer 160,and the dry hardcoat layer 180. The second hardcoat or dry hardcoatlayer 180 is disposed between and in contact with the adhesion promotionlayer 160 and the anti-fingerprint coating layer 190.

In one or more embodiments, any two, three or more of the FDS 104, theglass layer 110, the impact absorption layer 120, the moisture barrierlayer 130, the substrate 140, the wet hardcoat layer 150, the adhesionpromotion layer 160, the anti-reflectance layer 170, the dry hardcoatlayer 180, and/or the anti-fingerprint coating layer 190 can be coupled,connected, adhered, bonded, attached, or otherwise held together by oneor more adhesive layers (not shown). Each adhesive layer canindependently be or include one or more optically clear adhesives (OCAs)and/or pressure-sensitive adhesive (PSAs). In one or more examples, eachof the adhesive layers is applied as a liquid-based adhesive which driesand bonds the two adjacent surfaces together. In some examples, each ofthe adhesive layers is OCA two-sided tape that bonds the two adjacentsurfaces together.

In other embodiments, any two, three or more of the FDS 104, the glasslayer 110, the impact absorption layer 120, the moisture barrier layer130, the substrate 140, the wet hardcoat layer 150, the adhesionpromotion layer 160, the anti-reflectance layer 170, the dry hardcoatlayer 180, and/or the anti-fingerprint coating layer 190 can be coupled,connected, adhered, bonded, attached, or otherwise held together withoutthe use of an adhesive. As such, any or all of the adhesive layers maybe excluded and the neighboring components or layers are held togetherwith inherent bonding forces. For example, any two, three or more of theFDS 104, the glass layer 110, the impact absorption layer 120, themoisture barrier layer 130, the substrate 140, the wet hardcoat layer150, the adhesion promotion layer 160, the anti-reflectance layer 170,the dry hardcoat layer 180, and/or the anti-fingerprint coating layer190 can be coupled, connected, adhered, bonded, attached, or otherwiseheld together to the neighboring layer, film, or device and no adhesivelayer is at the interface therebetween. Any neighboring layer, film, ordevice can be deposited or otherwise formed directly onto the otherneighboring layer, film, or device.

FIG. 22 depicts a schematic, cross-sectional view of a display device2200 containing a flexible cover lens assembly 2202 disposed on the FDS104, according to one or more embodiments described and discussedherein. The flexible cover lens assembly 2202 contains the glass layer110, a first adhesion promotion layer 160 disposed on the glass layer110, the wet hardcoat layer 150 disposed on the first adhesion promotionlayer 160, and a second adhesion promotion layer 160 disposed on the wethardcoat layer 150. The flexible cover lens assembly 2202 also containsthe dry hardcoat layer 180 disposed on the second adhesion promotionlayer 160 and the anti-fingerprint coating layer 190 disposed on the dryhardcoat layer 180. In some examples, each of the first and secondadhesion promotion layers 160 can independently be different from oneanother. In other examples, the first and second adhesion promotionlayers 160 are identical to each other. In one or more examples, theanti-fingerprint coating layer 190 can have aninorganic-organic-inorganic layer stack.

FIG. 23 depicts a schematic, cross-sectional view of a display device2300 containing a flexible and replaceable cover lens stack 2302disposed on the FDS 104, according to one or more embodiments describedand discussed herein. The flexible and replaceable cover lens stack 2302contains a first flexible cover lens assembly 2310, a second flexiblecover lens assembly 2330, and a sacrificial adhesion layer 2320 disposedbetween the first flexible cover lens assembly 2310 and the secondflexible cover lens assembly 2330. Each of the first flexible cover lensassembly 2310 and the second flexible cover lens assembly 2330 canindependently be or include any one of the flexible cover lensassemblies described and discussed herein (e.g., the flexible cover lensassembly 102, 202, 302, 402, 502, 602, 702, 802, 902, 1002, 1102, 1202,1302, 1402, 1502, 1602, 1702, 1802, 1902, 2002, 2102, or 2202), wherethe first flexible cover lens assembly 2310 and the second flexiblecover lens assembly 2330 are different from each other.

In one or more embodiments, if it is desirable to remove and replace thefirst flexible cover lens assembly 2310 (e.g., due to being scratched orsuffering other damage), the sacrificial adhesion layer 2320 can beselectively degraded, destroyed, or otherwise removed in order toseparate the first flexible cover lens assembly 2310 from the secondflexible cover lens assembly 2330 or other display structure. The firstflexible cover lens assembly 2310 can be separated from the secondflexible cover lens assembly 2330 by exposing the sacrificial adhesionlayer 2320 to a predetermined temperature, a predetermined wavelengthand/or dosage of ultraviolet (UV) light, and/or a predeterminedmechanical removal mechanism, as further discussed and described below.

The sacrificial adhesion layer 2320 contains one or more polymeric oroligomeric materials which can be or include an acrylate, a silicone, athermoplastic adhesive, an elastomeric adhesive, and combinationsthereof. The sacrificial adhesion layer 2320 is degradable at atemperature of about 60° C. to about 120° C. The sacrificial adhesionlayer 2320 is degradable when exposed to ultraviolet light having awavelength of about 350 nm to about 375 nm for a period of about 0.5seconds to about 30 seconds.

In some examples, the sacrificial adhesion layer 2320 includes one ormore OCAs. The sacrificial adhesion layer 2320 can be or include one ormore polymeric or oligomeric materials, such as one or more acrylates,silicones, thermoplastic adhesives, elastomeric adhesives, or anycombination thereof. The sacrificial adhesion layer 2320 provides a lowshear modulus and allows the layer on top of the sacrificial adhesionlayer 2320 to shear or slip relative to the layer below the sacrificialadhesion layer 2320. In one or more examples, the sacrificial adhesionlayer 2320 can be formed from a liquid optically clear adhesive (LOCA)that can be dispensed in various ways and cured by UV exposure, or beheat, moisture, and/or pressure sensitive and be cured by adjusting orcontrolling the same. In some examples, the sacrificial adhesion layer2320 is degradable at a predetermined temperature. For examples thesacrificial adhesion layer 2320 can be degradable a temperature of about40° C., about 50° C., or about 60° C. to about 80° C., about 100° C., orabout 120° C. In other examples, the sacrificial adhesion layer 2320 isdegradable when exposed to UV light at predetermined wavelength and/orpredetermined dosage. For example, the sacrificial adhesion layer 2320is degradable when exposed to UV light having a wavelength of about 350nm to about 375 nm, such as about 365 nm. The sacrificial adhesion layer2320 can be degraded by exposing the adhesive to the UV light for aperiod of about 0.5 seconds, about 1 second, or about 5 seconds to about30 seconds, about 60 seconds, or about 90 seconds.

The sacrificial adhesion layer 2320 contains an adhesive that isdifferent than the adhesive in any other the adhesive layers, if any,contained in the flexible and replaceable cover lens stack 2302. Theadhesive in the sacrificial adhesion layer 2320 can have a differentcomposition than the adhesive in any other the adhesive layers, if any,contained in the first flexible cover lens assembly 2310 and the secondflexible cover lens assembly 2330. The adhesive in the sacrificialadhesion layer 2320 is degraded or destroyed when exposed to apredetermined temperature or wavelength of UV light. As such, theadhesion or bond between the first flexible cover lens assembly 2310 andthe second flexible cover lens assembly 2330 is broken and then thefirst flexible cover lens assembly 2310 and the second flexible coverlens assembly 2330 can be separated from each other. During same timeperiod, the adhesive in any of the adhesive layers, if any, within thefirst flexible cover lens assembly 2310 and the second flexible coverlens assembly 2330 is not degraded or destroyed when exposed to the samepredetermined temperature or wavelength of UV light and the adhesion orbonding between the components within the first flexible cover lensassembly 2310 and the second flexible cover lens assembly 2330 ispreserved.

In one or more embodiments, the first flexible cover lens assembly 2310and the second flexible cover lens assembly 2330 can independently haveflexibility over repeated cycles to bend to as low as 1 mm inside radiusof curvature or as low as 4 mm outside radius of curvature. In someembodiments, during bend operations of the display device containing thecover lens assembly 2300, the first flexible cover lens assembly 2310can independently move relative to the second flexible cover lensassembly 2330 by slipping, shearing, and/or sliding mechanism providedby the sacrificial adhesion layer 2320. Such a slip, shear and/or slideplane that separates the first flexible cover lens assembly 2310 and thesecond flexible cover lens assembly 2330 may be engineered in thematerial of the sacrificial adhesion layer 2320. The first flexiblecover lens assembly 2310 and the second flexible cover lens assembly2330 can independently have an impact resistance, with or without theimpact absorption layers, as measured by a standard ball drop test,showing an ability to withhold up to 130 g steel ball dropped from a 100cm height, and in some examples, a height of greater than 100 cm, suchas 120 cm to about 150 cm. In some example, the first flexible coverlens assembly 2310 and the second flexible cover lens assembly 2330 canindependently have a scratch resistance as measured by a standard steelwool test loaded up to 1 kg and able to withstand a large number ofcycles, for example, about 100 cycles to about 4,000 cycles. The firstflexible cover lens assembly 2310 and the second flexible cover lensassembly 2330 can independently have a total transmission of about 85%to about 95%, a haze of less than 1%, a yellow index of B*<1, and a highfracture toughness.

FIG. 25 shows a schematic, cross-sectional view of a flexible displaystructure 304 that can be used as the flexible display structure 104contained in the display devices 100, 200, 300, 400, 500, 600, 700, 800,900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000,2100, 2200, and 2300 (FIGS. 1-23), according to one or more embodimentsdescribed and discussed herein. The flexible display structure 104, 304can be or include a flexible display, a rigid display, or other deviceand can be contained within a monitor, a display, a screen, atelevision, a phone (e.g., mobile phone, smart phone, or cellularphone), a computer or laptop, a tablet, a watch, or other electronicdevice. In one or more examples, the flexible display structure 304includes a contrast enhancing layer or a polarizer layer 320, a touchpanel 330, a display layer 340, a substrate 350, and a backing film 360.The polarizer layer 320 is or includes a multi-function film layercontaining a polarizer film. The polarizer layer 320 is used to reduceunwanted reflections due to the reflective metal that makes up theelectrode lines or metallic structures within the flexible displaystructure 304. The polarizer layer 320 can include a quarter-waveretarder and a linear polarizer formed from flexible lens film with athickness of less than 0.2 mm.

The touch panel 330 can include a touch sensor IC board and a touchsensor (not shown). In one or more examples, the touch sensor IC boardis a flexible and metal based printed circuit board. The display layer340 can be or include one or more light emitting diode (LED) displays,one or more liquid crystal displays (LCDs), or other suitable displaydevices. In some examples, the display layer 340 is an organic lightemitting diode (OLED) display. In some examples, the display layer 340is a quantum dot (OD) display. In one or more examples, the displaylayer 340 may include a thin film encapsulation (TFE), an organicemitting layer, a driver IC board, and a thin film transistor (TFT).

The substrate 350 can be or include a flexible plastic or polymericsubstrate. The substrate 350 can be transparent and/or colorless and insome examples, can be conductive. The substrate 350 can be or includeone or more polyimide materials, polyester terephthalates, polyetherether ketones, transparent conductive polyesters, polycarbonates,polyaryletherketones, or any combination thereof. The backing film 360can be or include one or more heat sink layers and/or one or moreprotective barrier layers.

Each of the components of the flexible display structure 104 can beadhered, bonded, or otherwise held together by one or more adhesives.For example, the polarizer layer 320 and the touch panel 330 are bondedtogether by an adhesive layer 325 disposed therebetween. The touch panel330 and the display layer 340 are bonded together by an adhesive layer335 disposed therebetween. The display layer 340 and the substrate 350are bonded together by an adhesive layer 345 disposed therebetween. Thesubstrate 350 and the backing film 360 are bonded together by anadhesive layer 355 disposed therebetween. Each of the adhesive layers325, 335, 345, 355 can independently be or include one or more OCA. Inone or more examples, each of the adhesive layers 325, 335, 345, 355 isapplied as a liquid-based adhesive which dries and bonds the twoadjacent surfaces together. In some examples, each of the adhesivelayers 325, 335, 345, 355 is OCA two-sided tape that bonds the twoadjacent surfaces together. In other embodiments, each of the adhesivelayers 325, 335, 345, 355 is independently not disposed between theirrespective neighboring layers which are held together by other bondingways. For example, any of the layers or components within the flexibledisplay structure 104 can be deposited or otherwise formed onto theneighboring layer or component.

The flexible cover lens assemblies 102, 202, 302, 402, 502, 602, 702,802, 902, 1002, 1102, 1202, 1302, 1402, 1502, 1602, 1702, 1802, 1902,2002, 2102, 2202, and 2310, and/or 2330, the display devices 100, 200,300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500,1600, 1700, 1800, 1900, 2000, 2100, 2200, and/or 2300 (FIGS. 1-23), theflexible display structures 104, 304 and/or any layers, films, orcoating thereof, can be manufactured using chemical vapor deposition(CVD), plasma-enhanced CVD (PE-CVD), atomic layer deposition (ALD),plasma-enhanced ALD (PE-ALD), physical vapor deposition (PVD) orsputtering, sheet-to-sheet processing, roll-to-roll processing,photo-lithography, etching, other film coating and curing processes,and/or other such suitable manufacturing processes. Suitablemanufacturing devices may be purchased from Applied Materials, Inc. ofSanta Clara, Calif.

The flexible cover lens assemblies (including flexible cover lensassemblies 102, 202, 302, 402, 502, 602, 702, 802, 902, 1002, 1102,1202, 1302, 1402, 1502, 1602, 1702, 1802, 1902, 2002, 2102, 2202, and2310, and/or 2330, the display devices 100, 200, 300, 400, 500, 600,700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800,1900, 2000, 2100, 2200, and/or 2300 (FIGS. 1-23)), the flexible displaystructures (including flexible display structures 104, 304), and/or anylayers, films, or coating thereof, can have a critical strain of greaterthan 1%, such as about 1.5%, about 2%, about 2.5%, about 3%, about 4%,or about 5% to about 5.5%, about 6%, about 7%, about 8%, about 9%, about10%, about 11%, about 12%, about 15%, or greater. For example, theflexible cover lens assemblies, the flexible display structures, and/orany layers, films, or coating thereof, can have a critical strain ofgreater than 1% to about 15%, about 2% to about 15%, about 3% to about15%, about 5% to about 15%, about 6% to about 15%, about 8% to about15%, about 10% to about 15%, about 2% to about 12%, about 3% to about12%, about 5% to about 12%, about 6% to about 12%, about 8% to about12%, about 10% to about 12%, about 2% to about 10%, about 3% to about10%, about 5% to about 10%, about 6% to about 10%, about 8% to about10%, about 2% to about 7%, about 3% to about 7%, about 4% to about 7%,or about 5% to about 7%. Critical strain is measured using an UltimateTensile Testing Machine with a prescribed elongation of the flexiblecover lens assembly or other layered stack. The maximum tensileelongation survived by the flexible cover lens assembly or other layeredstack without crack failure is defined as the critical strain of theflexible cover lens assembly or other layered stack.

The flexible cover lens and the flexible cover lens assemblies discussedand described herein may be used in any type of display device. Theflexible cover lens and the flexible cover lens assemblies have strongstrength, flexibility, elasticity, optical transmission, wearresistance, and/or thermostability. By utilizing a sacrificial adhesionlayer containing degradable optically clear adhesive between a firstflexible cover lens and a second flexible cover lens, or between a firstflexible cover lens and a display structure or display device, if damageoccurs, the first flexible cover lens can easily be removed (andreplaced with a new cover lens) without damage to the underlyingstructures or devices.

In one or more embodiments, although flexibility requirements aredependent on specific foldable display design and productconfigurations, in general, the foldable cover lens, as described anddiscussed herein, have enough flexibility to sustain repeated bendcycles, with each cycle folding the flexible cover lens to a radius ofcurvature of 5 mm or less. In terms of critical strain, the flexibilityof the cover lens can be indicated by the critical strain the cover lensis able to withstand, with greater than 1 critical strain.

Embodiments of the present disclosure further relate to any one or moreof the following paragraphs 1-93:

1. A flexible cover lens assembly, comprising: a glass layer; anadhesion promotion layer on the glass layer; an anti-reflectance layerdisposed on the adhesion promotion layer; a dry hardcoat layer having anano-indentation hardness in a range from about 1 GPa to about 5 GPa anddisposed on the anti-reflectance layer; and an anti-fingerprint coatinglayer disposed on the dry hardcoat layer.

2. A flexible cover lens assembly, comprising: a glass layer; asubstrate disposed on the glass layer; an adhesion promotion layer onthe substrate; an anti-reflectance layer disposed on the adhesionpromotion layer; a dry hardcoat layer having a porosity of about 1% toabout 7% and disposed on the anti-reflectance layer; and ananti-fingerprint coating layer disposed on the dry hardcoat layer.

3. A flexible cover lens assembly, comprising: a glass layer; asubstrate disposed on the glass layer; a wet hardcoat layer having anano-indentation hardness in a range from about 0.4 GPa to about 1.5 GPaand disposed on the substrate; an anti-reflectance layer disposed on thewet hardcoat layer; an adhesion promotion layer disposed on theanti-reflectance layer; and an anti-fingerprint coating layer disposedon the adhesion promotion layer.

4. A flexible cover lens assembly, comprising: a glass layer; anadhesion promotion layer disposed on the glass layer; a dry hardcoatlayer having a nano-indentation hardness in a range from about 1 GPa toabout 5 GPa and disposed on the adhesion promotion layer; and ananti-fingerprint coating layer disposed on the dry hardcoat layer.

5. A flexible cover lens assembly, comprising: a glass layer; asubstrate disposed on the glass layer; an adhesion promotion layerdisposed on the substrate; a dry hardcoat layer having a porosity ofabout 1% to about 7% and disposed on the adhesion promotion layer; andan anti-fingerprint coating layer disposed on the dry hardcoat layer.

6. A flexible cover lens assembly, comprising: a glass layer; asubstrate disposed on the glass layer; a wet hardcoat layer having anano-indentation hardness in a range from about 0.4 GPa to about 1.5 GPaand disposed on the substrate; an adhesion promotion layer disposed onthe wet hardcoat layer; a dry hardcoat layer disposed on the adhesionpromotion layer and having a nano-indentation hardness in a range fromabout 1 GPa to about 5 GPa and a porosity of about 1% to about 7%; andan anti-fingerprint coating layer disposed on the dry hardcoat layer.

7. A flexible cover lens assembly, comprising: a substrate; ananti-fingerprint coating layer; and an adhesion promotion layer disposedbetween the substrate and the anti-fingerprint coating layer.

8. A flexible cover lens assembly, comprising: a substrate; an adhesionpromotion layer disposed on the substrate; a dry hardcoat layer disposedon the adhesion promotion layer and having a porosity of about 1% toabout 7% and a nano-indentation hardness in a range from about 1 GPa toabout 5 GPa; and an anti-fingerprint coating layer disposed on the dryhardcoat layer.

9. A flexible cover lens assembly, comprising: a substrate; a wethardcoat layer having a nano-indentation hardness in a range from about0.4 GPa to about 1.5 GPa and disposed on the substrate; an adhesionpromotion layer disposed on the wet hardcoat layer; a dry hardcoat layerhaving a nano-indentation hardness in a range from about 1 GPa to about5 GPa and disposed on the adhesion promotion layer; and ananti-fingerprint coating layer disposed on the dry hardcoat layer.

10. A flexible cover lens assembly, comprising: a glass layer; an impactabsorption layer disposed on the glass layer; a moisture barrier layerdisposed on the impact absorption layer; a substrate disposed on themoisture barrier layer; a wet hardcoat layer having a nano-indentationhardness in a range from about 0.4 GPa to about 1.5 GPa and disposed onthe substrate; an adhesion promotion layer disposed on the wet hardcoatlayer; an anti-reflectance layer disposed on the adhesion promotionlayer; a dry hardcoat layer having a nano-indentation hardness in arange from about 1 GPa to about 5 GPa and disposed on theanti-reflectance layer; and an anti-fingerprint coating layer disposedon the dry hardcoat layer.

11. A flexible cover lens assembly, comprising: a glass layer; a firstadhesion promotion layer disposed on the glass layer; a wet hardcoatlayer having a nano-indentation hardness in a range from about 0.4 GPato about 1.5 GPa and disposed on the first adhesion promotion layer; asecond adhesion promotion layer disposed on the wet hardcoat layer; adry hardcoat layer having a nano-indentation hardness in a range fromabout 1 GPa to about 5 GPa and disposed on the second adhesion promotionlayer; and an anti-fingerprint coating layer disposed on the dryhardcoat layer.

12. A flexible cover lens assembly, comprising: a glass layer; a firstadhesion promotion layer disposed on the glass layer; a wet hardcoatlayer having a porosity of about 6% to about 10% and disposed on thefirst adhesion promotion layer; a second adhesion promotion layerdisposed on the wet hardcoat layer; a dry hardcoat layer having aporosity of about 1% to about 7% and disposed on the second adhesionpromotion layer; and an anti-fingerprint coating layer disposed on thedry hardcoat layer, wherein the flexible cover lens assembly has acritical strain of greater than 1% to about 15%.

13. A flexible cover lens assembly, comprising: an anti-fingerprintcoating layer; an adhesion promotion layer; and a dry hardcoat, whereinthe dry hardcoat layer is disposed between the adhesion promotion layerand the anti-fingerprint coating layer.

14. A flexible cover lens assembly, comprising: a substrate; a wethardcoat layer disposed on the substrate; an adhesion promotion layerdisposed on the wet hardcoat layer; an anti-reflectance layer disposedon the adhesion promotion layer; a dry hardcoat layer disposed on theanti-reflectance layer; and an anti-fingerprint coating layer disposedon the dry hardcoat layer.

15. A flexible cover lens assembly, comprising: a glass layer; asubstrate disposed on the glass layer; a wet hardcoat layer disposed onthe substrate; an adhesion promotion layer disposed on the wet hardcoatlayer; an anti-reflectance layer disposed on the adhesion promotionlayer; a dry hardcoat layer disposed on the anti-reflectance layer; andan anti-fingerprint coating layer disposed on the dry hardcoat layer.

16. A flexible cover lens assembly, comprising: a glass layer; an impactabsorption layer disposed on the glass layer; a substrate disposed onthe impact absorption layer; an adhesion promotion layer disposed on thesubstrate; an anti-reflectance layer disposed on the adhesion promotionlayer; a dry hardcoat layer disposed on the anti-reflectance layer; andan anti-fingerprint coating layer disposed on the dry hardcoat layer.

17. The flexible cover lens assembly of paragraph 16, further comprisinga wet hardcoat layer, wherein the wet hardcoat layer is disposed betweenthe substrate and the adhesion promotion layer.

18. A flexible cover lens assembly, comprising: an impact absorptionlayer; a substrate disposed on the impact absorption layer; a wethardcoat layer disposed on the substrate; an adhesion promotion layerdisposed on the wet hardcoat layer; an anti-reflectance layer disposedon the adhesion promotion layer; a dry hardcoat layer disposed on theanti-reflectance layer; and an anti-fingerprint coating layer disposedon the dry hardcoat layer.

19. The flexible cover lens assembly of paragraph 18, further comprisinga glass layer disposed between the impact absorption layer and thesubstrate.

20. A flexible cover lens assembly, comprising: a moisture barrierlayer; a substrate disposed on the moisture barrier layer; a wethardcoat layer disposed on the substrate; an adhesion promotion layerdisposed on the wet hardcoat layer; an anti-reflectance layer disposedon the adhesion promotion layer; a dry hardcoat layer disposed on theanti-reflectance layer; and an anti-fingerprint coating layer disposedon the dry hardcoat layer.

21. The flexible cover lens assembly of paragraph 20, further comprisingan impact absorption layer disposed between the moisture barrier layerand the substrate.

22. A flexible cover lens assembly, comprising: a moisture barrierlayer; an impact absorption layer disposed on the moisture barrierlayer; a substrate disposed on the impact absorption layer; an adhesionpromotion layer disposed on the substrate; an anti-reflectance layerdisposed on the adhesion promotion layer; a dry hardcoat layer disposedon the anti-reflectance layer; and an anti-fingerprint coating layerdisposed on the dry hardcoat layer.

23. The flexible cover lens assembly according to any one of paragraphs1-22, wherein the flexible cover lens assembly has a critical strain ofgreater than 1% to about 15%.

24. The flexible cover lens assembly according to any one of paragraphs1-23, wherein the flexible cover lens assembly has a critical strain ofabout 2% to about 12%.

25. The flexible cover lens assembly according to any one of paragraphs1-24, further comprising a substrate disposed between the glass layerand the adhesion promotion layer.

26. The flexible cover lens assembly according to any one of paragraphs1-25, wherein the glass layer is an ultra-thin glass layer and hasthickness in a range from about 20 μm to about 100 μm.

27. The flexible cover lens assembly according to any one of paragraphs1-26, wherein the dry hardcoat layer comprises a material selected fromthe group consisting of silicon oxide, silicon carbide, siliconoxycarbide, silicon nitride, silicon oxynitride, silicon oxycarbidenitride, a dopant thereof, and any combination thereof.

28. The flexible cover lens assembly according to any one of paragraphs1-27, wherein the dry hardcoat layer is produced from a vapor depositionprocess and has a nano-indentation hardness in a range from about 1.5GPa to about 4.5 GPa.

29. The flexible cover lens assembly according to any one of paragraphs1-28, wherein the dry hardcoat layer has a porosity of about 1% to about7%.

30. The flexible cover lens assembly according to any one of paragraphs1-29, wherein the dry hardcoat layer has a refractive index of about1.42 to about 1.55.

31. The flexible cover lens assembly according to any one of paragraphs1-30, wherein the dry hardcoat layer has a refractive index of about1.45 to about 1.51.

32. The flexible cover lens assembly according to any one of paragraphs1-31, wherein the dry hardcoat layer has a thickness in a range fromabout 0.5 μm to about 40 μm.

33. The flexible cover lens assembly according to any one of paragraphs1-32, wherein the dry hardcoat layer is produced from a vapor depositionprocess.

34. The flexible cover lens assembly according to any one of paragraphs1-33, wherein the dry hardcoat layer is produced from a vapor depositionprocess selected from the group consisting of PVD, CVD, PE-CVD, HDP-CVD,ALD, PE-ALD, and any combination thereof.

35. The flexible cover lens assembly according to any one of paragraphs1-34, wherein the wet hardcoat layer comprises an acrylate, a solgel, asiloxane, a copolymer thereof, an elastomer thereof, or any combinationthereof.

36. The flexible cover lens assembly according to any one of paragraphs1-35, wherein the wet hardcoat layer comprises an acrylate, and whereinthe acrylate comprises a radiation curable acrylate, aliphatic urethaneacrylate, a copolymer thereof, an elastomer thereof, or any combinationthereof.

37. The flexible cover lens assembly according to any one of paragraphs1-36, wherein the wet hardcoat layer is produced from a gel, aspin-coating, a solution, a suspension, or any combination thereof.

38. The flexible cover lens assembly according to any one of paragraphs1-37, wherein the wet hardcoat layer has a porosity of about 6% to about10%.

39. The flexible cover lens assembly according to any one of paragraphs1-38, wherein the wet hardcoat layer has a refractive index of about1.40 to about 1.55.

40. The flexible cover lens assembly according to any one of paragraphs1-39, wherein the wet hardcoat layer has a refractive index of about1.43 to about 1.51.

41. The flexible cover lens assembly according to any one of paragraphs1-40, wherein the wet hardcoat layer has a nano-indentation hardness ina range from about 0.5 GPa to about 1.2 GPa.

42. The flexible cover lens assembly according to any one of paragraphs1-41, wherein the wet hardcoat layer has a thickness in a range fromabout 0.5 μm to about 40 μm.

43. The flexible cover lens assembly according to any one of paragraphs1-42, further comprising a substrate disposed between the glass layerand the adhesion promotion layer.

44. The flexible cover lens assembly according to any one of paragraphs1-43, further comprising a wet hardcoat layer having a nano-indentationhardness in a range from about 0.4 GPa to about 1.5 GPa, and wherein thewet hardcoat layer is disposed between the substrate and the adhesionpromotion layer.

45. The flexible cover lens assembly according to any one of paragraphs1-44, further comprising a dry hardcoat layer having a nano-indentationhardness in a range from about 1 GPa to about 5 GPa, wherein the dryhardcoat layer is disposed between the adhesion promotion layer and theanti-fingerprint coating layer.

46. The flexible cover lens assembly according to any one of paragraphs1-45, wherein the adhesion promotion layer comprises a material selectedfrom the group consisting of silicon oxide, silicon carbide, siliconoxycarbide, silicon nitride, silicon oxynitride, silicon oxycarbidenitride, a dopant thereof, and any combination thereof.

47. The flexible cover lens assembly according to any one of paragraphs1-46, wherein the adhesion promotion layer has a gradient of carbonconcentration across a thickness of the adhesion promotion layer.

48. The flexible cover lens assembly according to any one of paragraphs1-47, wherein the adhesion promotion layer comprises from about 2sublayers to about 10 sublayers.

49. The flexible cover lens assembly according to any one of paragraphs1-48, wherein the adhesion promotion layer comprises a plurality ofsublayers contained therein, and wherein the plurality of sublayerscomprises a gradient of carbon concentration across a thickness of theadhesion promotion layer.

50. The flexible cover lens assembly according to any one of paragraphs1-49, wherein the adhesion promotion layer comprises a plurality ofsublayers contained therein, and wherein the plurality of sublayerscomprises a gradient of hardness across a thickness of the adhesionpromotion layer.

51. The flexible cover lens assembly according to any one of paragraphs1-50, wherein the adhesion promotion layer comprises a plurality ofsublayers contained therein, and wherein the plurality of sublayers hasa nano-indentation hardness across a thickness of the adhesion promotionlayer within a range from about 0.1 GPa to about 5 GPa, as measured bynano-indentation technique.

52. The flexible cover lens assembly of paragraph 51, wherein thehardness is within a range from about 0.5 GPa to about 3.5 GPa, asmeasured by nano-indentation technique.

53. The flexible cover lens assembly according to any one of paragraphs1-52, wherein the adhesion promotion layer is produced from a vapordeposition process.

54. The flexible cover lens assembly according to any one of paragraphs1-53, wherein the adhesion promotion layer is produced from a vapordeposition process selected from the group consisting of PVD,sputtering, CVD, PE-CVD, HDP-CVD, ALD, PE-ALD, and any combinationthereof.

55. The flexible cover lens assembly according to any one of paragraphs1-54, wherein the adhesion promotion layer is produced from a siliconprecursor and an oxidizing agent.

56. The flexible cover lens assembly of paragraph 55, wherein thesilicon precursor comprises an alkylsilane, an alkoxysilane, analkylsiloxane, an alkylsilazane, or any combination thereof.

57. The flexible cover lens assembly according to any one of paragraphs1-56, wherein the adhesion promotion layer has a refractive index ofabout 1.40 to about 1.55.

58. The flexible cover lens assembly according to any one of paragraphs1-57, wherein the adhesion promotion layer has a refractive index ofabout 1.43 to about 1.51.

59. The flexible cover lens assembly according to any one of paragraphs1-58, wherein the adhesion promotion layer has a thickness in a rangefrom about 0.04 μm to about 30 μm.

60. The flexible cover lens assembly according to any one of paragraphs1-59, wherein the moisture barrier layer comprises a material selectedfrom the group consisting of silicon oxide, silicon nitride, siliconoxynitride, a dopant thereof, and any combination thereof.

61. The flexible cover lens assembly according to any one of paragraphs1-60, wherein the moisture barrier layer comprises from about 2sublayers to about 5 sublayers.

62. The flexible cover lens assembly according to any one of paragraphs1-61, wherein the moisture barrier layer comprises a plurality ofsublayers contained therein.

63. The flexible cover lens assembly according to any one of paragraphs1-62, wherein the moisture barrier layer comprises a film stackcomprising a second sublayer disposed between a first sublayer and athird sublayer, and wherein the first sublayer comprises siliconnitride, the second sublayer comprises silicon oxide, and the thirdsublayer comprises silicon nitride.

64. The flexible cover lens assembly according to any one of paragraphs1-63, wherein the moisture barrier layer is produced from a vapordeposition process.

65. The flexible cover lens assembly according to any one of paragraphs1-64, wherein the moisture barrier layer is produced from a vapordeposition process selected from the group consisting of PVD, CVD,PE-CVD, HDP-CVD, ALD, PE-ALD, and any combination thereof.

66. The flexible cover lens assembly according to any one of paragraphs1-65, wherein the moisture barrier layer has a water vapor transportrate (WVTR) within a range from about 1×10⁻⁶ g/m²/day to about 10g/m²/day.

67. The flexible cover lens assembly according to any one of paragraphs1-66, wherein the moisture barrier layer has a thickness in a range fromabout 20 nm to about 500 nm.

68. The flexible cover lens assembly according to any one of paragraphs1-67, wherein the moisture barrier layer has an optical transmission inthe visible range within a range from about 85% to about 98%.

69. The flexible cover lens assembly according to any one of paragraphs1-68, wherein the impact absorption layer comprises a material selectedfrom the group consisting of ether urethane, ester urethane, aliphaticurethane, aliphatic polyurethane, aliphatic polyester urethane,polysulfide thermoset, poly amide, copolymers thereof, elastomersthereof, and any combination thereof.

70. The flexible cover lens assembly according to any one of paragraphs1-69, wherein the impact absorption layer has a thickness in a rangefrom about 1 μm to about 150 μm.

71. The flexible cover lens assembly according to any one of paragraphs1-70, wherein the impact absorption layer has an optical transmission inthe visible range within a range from about 85% to about 98%.

72. The flexible cover lens assembly according to any one of paragraphs1-71, wherein the anti-fingerprint coating layer comprises a materialselected from the group consisting of a perfluoropolyether-containingsilane polymer, a chlorosilane, an oxysilane, a fluoroethylene, aperfluoropolyether, a dopant thereof, and any combination thereof.

73. The flexible cover lens assembly according to any one of paragraphs1-72, wherein the anti-fingerprint coating layer is produced from avapor deposition process.

74. The flexible cover lens assembly according to any one of paragraphs1-73, wherein the anti-fingerprint coating layer is produced from adeposition process selected from the group consisting of PVD, ion beamevaporation, CVD, spin coating, spray coating, dip coating, thermalcuring, and any combination thereof.

75. The flexible cover lens assembly according to any one of paragraphs1-74, wherein the anti-fingerprint coating layer has a surface energywithin a range from about 10 dyne/cm to about 80 dyne/cm.

76. The flexible cover lens assembly according to any one of paragraphs1-75, wherein the anti-fingerprint coating layer has a surface energywithin a range from about 30 dyne/cm to about 50 dyne/cm.

77. The flexible cover lens assembly according to any one of paragraphs1-76, wherein the anti-fingerprint coating layer has a thickness in arange from about 3 nm to about 50 nm.

78. The flexible cover lens assembly according to any one of paragraphs1-77, wherein the anti-reflectance layer has a refractive index of about1.7 to about 2.3.

79. The flexible cover lens assembly according to any one of paragraphs1-78, wherein the anti-reflectance layer has a refractive index of about1.8 to about 2.1.

80. The flexible cover lens assembly according to any one of paragraphs1-79, wherein the anti-reflectance layer has an optical transmission inthe visible range within a range from about 85% to about 98%.

81. The flexible cover lens assembly according to any one of paragraphs1-80, wherein the anti-reflectance layer has a thickness in a range fromabout 2 nm to about 150 nm.

82. The flexible cover lens assembly according to any one of paragraphs1-81, wherein the anti-reflectance layer comprises a material selectedfrom the group consisting of silicon nitride, silicon oxynitride,silicon carbide nitride, silicon oxycarbide nitride, a dopant thereof,and any combination thereof.

83. The flexible cover lens assembly according to any one of paragraphs1-82, wherein the anti-reflectance layer comprises silicon nitride.

84. The flexible cover lens assembly according to any one of paragraphs1-83, wherein the anti-reflectance layer is produced from a vapordeposition process.

85. The flexible cover lens assembly according to any one of paragraphs1-84, wherein the anti-reflectance layer is produced from a vapordeposition process selected from the group consisting of sputtering,PVD, CVD, PE-CVD, HDP-CVD, ALD, PE-ALD, and any combination thereof.

86. The flexible cover lens assembly according to any one of paragraphs1-85, wherein the substrate has a thickness in a range from about 5 μmto about 100 μm.

87. The flexible cover lens assembly according to any one of paragraphs1-86, wherein the substrate comprises a material selected from the groupconsisting of a polyethylene terephthalate, a triacetylcellulose, apolycarbonate, a polyimide, a polyamide, a polysulfide, apolymethacrylic acid methyl ester, copolymers thereof, elastomersthereof, and any combination thereof.

88. A flexible and replaceable cover lens stack, comprising: a firstflexible cover lens comprising the flexible cover lens assemblyaccording to any one of paragraphs 1-87; a second flexible cover lenscomprising the flexible cover lens assembly according to any one ofparagraphs 1-87, wherein the first and second cover lens are different;and a sacrificial adhesion layer disposed between the first flexiblecover lens and the second flexible cover lens.

89. The flexible and replaceable cover lens stack of paragraph 88,wherein the sacrificial adhesion layer comprises a polymeric oroligomeric material selected from the group consisting of an acrylate, asilicone, a thermoplastic adhesive, an elastomeric adhesive, andcombinations thereof.

90. The flexible and replaceable cover lens stack of paragraph 88,wherein the sacrificial adhesion layer is degradable at a temperature ofabout 60° C. to about 120° C.

91. The flexible and replaceable cover lens stack of paragraph 88,wherein the sacrificial adhesion layer is degradable when exposed toultraviolet light having a wavelength of about 350 nm to about 375 nmfor a period of about 0.5 seconds to about 30 seconds.

92. A display device, comprising: the flexible cover lens assembly orthe flexible and replaceable cover lens stack according to any one ofparagraphs 1-91; and a flexible display structure.

93. The display device of paragraph 92, wherein the flexible displaystructure comprises an OLED display or an LCD display.

While the foregoing is directed to embodiments of the disclosure, otherand further embodiments may be devised without departing from the basicscope thereof, and the scope thereof is determined by the claims thatfollow. All documents described herein are incorporated by referenceherein, including any priority documents and/or testing procedures tothe extent they are not inconsistent with this text. As is apparent fromthe foregoing general description and the specific embodiments, whileforms of the present disclosure have been illustrated and described,various modifications can be made without departing from the spirit andscope of the present disclosure. Accordingly, it is not intended thatthe present disclosure be limited thereby. Likewise, the term“comprising” is considered synonymous with the term “including” forpurposes of United States law. Likewise whenever a composition, anelement or a group of elements is preceded with the transitional phrase“comprising”, it is understood that we also contemplate the samecomposition or group of elements with transitional phrases “consistingessentially of,” “consisting of”, “selected from the group of consistingof,” or “is” preceding the recitation of the composition, element, orelements and vice versa.

Certain embodiments and features have been described using a set ofnumerical upper limits and a set of numerical lower limits. It should beappreciated that ranges including the combination of any two values,e.g., the combination of any lower value with any upper value, thecombination of any two lower values, and/or the combination of any twoupper values are contemplated unless otherwise indicated. Certain lowerlimits, upper limits and ranges appear in one or more claims below.

What is claimed is:
 1. A flexible cover lens assembly, comprising: asubstrate; an anti-fingerprint coating layer; and an adhesion promotionlayer disposed between the substrate and the anti-fingerprint coatinglayer.
 2. The flexible cover lens assembly of claim 1, wherein theflexible cover lens assembly has a critical strain of greater than 1% toabout 15%.
 3. The flexible cover lens assembly of claim 1, furthercomprising a dry hardcoat layer having a nano-indentation hardness in arange from about 1 GPa to about 5 GPa, wherein the dry hardcoat layer isdisposed between the adhesion promotion layer and the anti-fingerprintcoating layer.
 4. The flexible cover lens assembly of claim 1, whereinthe adhesion promotion layer comprises a material selected from thegroup consisting of silicon oxide, silicon carbide, silicon oxycarbide,silicon nitride, silicon oxynitride, silicon oxycarbide nitride, adopant thereof, and any combination thereof.
 5. The flexible cover lensassembly of claim 1, wherein the adhesion promotion layer has a gradientof carbon concentration across a thickness of the adhesion promotionlayer.
 6. The flexible cover lens assembly of claim 1, wherein theadhesion promotion layer comprises from about 2 sublayers to about 10sublayers.
 7. The flexible cover lens assembly of claim 1, wherein theadhesion promotion layer comprises a plurality of sublayers containedtherein, and wherein the plurality of sublayers comprises a gradient ofcarbon concentration across a thickness of the adhesion promotion layer.8. The flexible cover lens assembly of claim 1, wherein the adhesionpromotion layer comprises a plurality of sublayers contained therein,and wherein the plurality of sublayers comprises a gradient of hardnessacross a thickness of the adhesion promotion layer.
 9. The flexiblecover lens assembly of claim 1, wherein the adhesion promotion layercomprises a plurality of sublayers contained therein, and wherein theplurality of sublayers has a nano-indentation hardness across athickness of the adhesion promotion layer within a range from about 0.1GPa to about 5 GPa, as measured by nano-indentation technique.
 10. Aflexible cover lens assembly, comprising: a substrate; an adhesionpromotion layer disposed on the substrate; a dry hardcoat layer disposedon the adhesion promotion layer and having a porosity of about 1% toabout 7% and a nano-indentation hardness in a range from about 1 GPa toabout 5 GPa; and an anti-fingerprint coating layer disposed on the dryhardcoat layer.
 11. The flexible cover lens assembly of claim 10,wherein the flexible cover lens assembly has a critical strain ofgreater than 1% to about 15%.
 12. The flexible cover lens assembly ofclaim 10, wherein the adhesion promotion layer comprises a materialselected from the group consisting of silicon oxide, silicon carbide,silicon oxycarbide, silicon nitride, silicon oxynitride, siliconoxycarbide nitride, a dopant thereof, and any combination thereof, andwherein the dry hardcoat layer comprises a material selected from thegroup consisting of silicon oxide, silicon carbide, silicon oxycarbide,silicon nitride, silicon oxynitride, silicon oxycarbide nitride, adopant thereof, and any combination thereof.
 13. A flexible cover lensassembly, comprising: a substrate; a wet hardcoat layer having anano-indentation hardness in a range from about 0.4 GPa to about 1.5 GPaand disposed on the substrate; an adhesion promotion layer disposed onthe wet hardcoat layer; a dry hardcoat layer having a nano-indentationhardness in a range from about 1 GPa to about 5 GPa and disposed on theadhesion promotion layer; and an anti-fingerprint coating layer disposedon the dry hardcoat layer.
 14. The flexible cover lens assembly of claim13, wherein the flexible cover lens assembly has a critical strain ofgreater than 1% to about 15%.
 15. The flexible cover lens assembly ofclaim 13, wherein the dry hardcoat layer comprises a material selectedfrom the group consisting of silicon oxide, silicon carbide, siliconoxycarbide, silicon nitride, silicon oxynitride, silicon oxycarbidenitride, a dopant thereof, and any combination thereof.
 16. The flexiblecover lens assembly of claim 13, wherein the wet hardcoat layercomprises an acrylate, a solgel, a siloxane, a copolymer thereof, anelastomer thereof, or any combination thereof.
 17. The flexible coverlens assembly of claim 13, wherein the wet hardcoat layer comprises anacrylate, and wherein the acrylate comprises a radiation curableacrylate, aliphatic urethane acrylate, a copolymer thereof, an elastomerthereof, or any combination thereof.
 18. The flexible cover lensassembly of claim 13, wherein the wet hardcoat layer has a porosity ofabout 6% to about 10%.
 19. The flexible cover lens assembly of claim 13,wherein the wet hardcoat layer has a refractive index of about 1.40 toabout 1.55.
 20. The flexible cover lens assembly of claim 13, whereinthe wet hardcoat layer has a nano-indentation hardness in a range fromabout 0.5 GPa to about 1.2 GPa, and wherein the wet hardcoat layer has athickness in a range from about 0.5 μm to about 40 μm.